A252568 - cp's OEIS frontend

A252568 Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7.

n	a(n)
1	843
2	868
3	1558
4	3286
5	7610
6	17261
7	39419
8	94224
9	218717
10	504824
11	1216914
12	2842764
13	6585725
14	15930113
15	37308440
16	86581201
17	209741403
18	491769283
19	1142254876
20	2768731230
21	6494985545
22	15093638282
23	36592496037
24	85859457999
25	199589766685

[843, 868, 1558, 3286, 7610, 17261, 39419, 94224, 218717, 504824, 1216914, 2842764, 6585725, 15930113, 37308440, 86581201, 209741403, 491769283, 1142254876, 2768731230, 6494985545, 15093638282, 36592496037, 85859457999, 199589766685]

cp's OEIS Frontend

A252568 Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7.

Table of values

List of values