A321725 - cp's OEIS frontend

A321725 Irregular triangle read by rows where T(n,k) is the number of d X d non-normal semi-magic squares with d = A027750(n,k) and sum of all entries equal to n.

n	a(n)
1	1
2	1
3	2
4	1
5	6
6	1
7	3
8	24
9	1
10	120
11	1
12	4
13	21
14	720
15	1
16	5040
17	1
18	5
19	282
20	40320
21	1
22	55
23	362880
24	1
25	6
26	6210
27	3628800
28	1
29	39916800
30	1
31	7
32	120
33	2008
34	202410
35	479001600
36	1
37	6227020800
38	1
39	8
40	9135630
41	87178291200
42	1
43	231
44	153040
45	1307674368000
46	1
47	9
48	10147

[1, 1, 2, 1, 6, 1, 3, 24, 1, 120, 1, 4, 21, 720, 1, 5040, 1, 5, 282, 40320, 1, 55, 362880, 1, 6, 6210, 3628800, 1, 39916800, 1, 7, 120, 2008, 202410, 479001600, 1, 6227020800, 1, 8, 9135630, 87178291200, 1, 231, 153040, 1307674368000, 1, 9, 10147]

cp's OEIS Frontend

A321725 Irregular triangle read by rows where T(n,k) is the number of d X d non-normal semi-magic squares with d = A027750(n,k) and sum of all entries equal to n.

Table of values

List of values