A187633 - cp's OEIS frontend

A187633 T(n,k)=Number of (n+1)X(n+1) 0..k arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.

n	a(n)
1	10
2	31
3	24
4	64
5	446
6	24
7	113
8	2924
9	1648
10	954
11	170
12	12104
13	14044
14	557382
15	954
16	255
17	37448
18	106892
19	31903442
20	672698
21	194008
22	336
23	98014
24	306320
25	686589106
26	33869160
27	21411605018
28	194008
29	449
30	221640
31	1848504
32	7836968262
33	795758912

[10, 31, 24, 64, 446, 24, 113, 2924, 1648, 954, 170, 12104, 14044, 557382, 954, 255, 37448, 106892, 31903442, 672698, 194008, 336, 98014, 306320, 686589106, 33869160, 21411605018, 194008, 449, 221640, 1848504, 7836968262, 795758912]

cp's OEIS Frontend

A187633 T(n,k)=Number of (n+1)X(n+1) 0..k arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.

Table of values

List of values