A187705 - cp's OEIS frontend

A187705 T(n,k)=Number of (n+1)X(n+1) 0..k arrays with each 2X2 subblock off diagonal and antidiagonal nonsingular and the array of 2X2 subblock determinants antisymmetric about the diagonal and antidiagonal.

n	a(n)
1	10
2	31
3	128
4	64
5	1489
6	2
7	113
8	8272
9	72
10	34
11	170
12	31461
13	322
14	5030
15	0
16	255
17	93476
18	1718
19	81456
20	36
21	2
22	336
23	235773
24	2904
25	875696
26	530
27	7410
28	0
29	449
30	524284
31	9834
32	4225652
33	4612
34	230446
35	474
36	0
37	570
38	1062857
39	13324
40	22532156
41	12898

[10, 31, 128, 64, 1489, 2, 113, 8272, 72, 34, 170, 31461, 322, 5030, 0, 255, 93476, 1718, 81456, 36, 2, 336, 235773, 2904, 875696, 530, 7410, 0, 449, 524284, 9834, 4225652, 4612, 230446, 474, 0, 570, 1062857, 13324, 22532156, 12898]

cp's OEIS Frontend

A187705 T(n,k)=Number of (n+1)X(n+1) 0..k arrays with each 2X2 subblock off diagonal and antidiagonal nonsingular and the array of 2X2 subblock determinants antisymmetric about the diagonal and antidiagonal.

Table of values

List of values