A187528 - cp's OEIS frontend

A187528 T(n,k)=Number of (n+1)X(n+1) 0..k arrays with each 2X2 subblock determinant nonzero and the array of 2X2 subblock determinants symmetric under 90 degree rotation.

n	a(n)
1	6
2	50
3	0
4	192
5	8
6	104
7	512
8	74
9	3790
10	0
11	1126
12	280
13	35026
14	1476
15	9346
16	2146
17	784
18	220802
19	20554
20	3607148
21	0
22	3760
23	1970
24	727842
25	273102
26	164460556
27	296232
28	4278774
29	6112
30	3580
31	2327574
32	992410

[6, 50, 0, 192, 8, 104, 512, 74, 3790, 0, 1126, 280, 35026, 1476, 9346, 2146, 784, 220802, 20554, 3607148, 0, 3760, 1970, 727842, 273102, 164460556, 296232, 4278774, 6112, 3580, 2327574, 992410]

cp's OEIS Frontend

A187528 T(n,k)=Number of (n+1)X(n+1) 0..k arrays with each 2X2 subblock determinant nonzero and the array of 2X2 subblock determinants symmetric under 90 degree rotation.

Table of values

List of values