21x21 concentric magic square with diamond

A concentric magic square is nice. A concentric magic square with diamond is even better; see i.e. the 15x15 Al Antaakii concentric magic square with diamond. In the diamond are alle odd numbers (and outside the diamond are the even numbers).

How to construct a concentric magic square with diamond? Puzzle in EXCEL and see the result below:

21x21 concentric magic square with diamond

134	304	302	142	298	146	294	150	290	154	1	286	158	282	162	278	168	272	270	244	306
176	76	80	360	84	356	88	352	92	79	343	387	348	96	344	100	102	338	210	364	266
178	336	34	38	402	42	398	46	5	435	9	431	13	394	50	390	388	276	406	106	264
262	108	386	10	14	426	18	25	415	29	411	33	407	37	422	420	218	430	56	334	180
182	332	58	418	2	436	95	91	87	83	73	371	375	379	383	60	438	24	384	110	260
258	112	380	26	434	319	305	309	313	317	321	113	109	105	101	119	8	416	62	330	184
186	328	378	414	385	103	159	301	297	293	157	161	165	169	287	339	57	28	64	114	256
254	124	376	39	381	107	171	183	173	177	257	253	249	255	271	335	61	403	66	318	188
190	324	15	401	377	111	167	267	239	231	201	199	235	175	275	331	65	41	427	118	252
250	367	425	399	373	115	163	263	209	215	229	219	233	179	279	327	69	43	17	75	192
439	389	19	397	365	117	289	261	205	225	221	217	237	181	153	325	77	45	423	53	3
194	97	421	47	81	315	291	191	245	223	213	227	197	251	151	127	361	395	21	345	248
246	120	23	393	85	311	295	195	207	211	241	243	203	247	147	131	357	49	419	322	196
200	320	68	51	89	307	299	187	269	265	185	189	193	259	143	135	353	391	374	122	242
240	126	372	30	93	303	155	141	145	149	285	281	277	273	283	139	349	412	70	316	202
236	314	72	410	204	323	137	133	129	125	121	329	333	337	341	123	238	32	370	128	206
230	130	368	268	4	6	347	351	355	359	369	71	67	63	59	382	440	174	74	312	212
214	310	326	12	428	16	424	417	27	413	31	409	35	405	20	22	224	432	116	132	228
216	208	36	404	40	400	44	396	437	7	433	11	429	48	392	52	54	166	408	234	226
220	78	362	82	358	86	354	90	350	363	99	55	94	346	98	342	340	104	232	366	222
136	138	140	300	144	296	148	292	152	288	441	156	284	160	280	164	274	170	172	198	308

Puzzle yourself using the EXCEL download below.

Al Antaakii 21x21.xls

Microsoft Excel werkblad 82.5 KB

Download

For each magic square of odd order, you can construct a concentric magic square with diamond. See on this website:

3x3, 5x5, 7x7, 9x9, 11x11, 13x13, 15x15, 17x17, 19x19, 21x21, 23x23, 25x25, 27x27, 29x29 and 31x31

21x21 magic square