A252577 - cp's OEIS frontend

A252577 Number of (3+2)X(n+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	890
2	1558
3	4168
4	9051
5	30532
6	92725
7	208375
8	715437
9	2196824
10	4932817
11	17087917
12	52719076
13	118137939
14	412475333
15	1277261765
16	2857270465
17	10039630707
18	31180060771
19	69654819267
20	245981412469
21	765710684488
22	1708718651733

[890, 1558, 4168, 9051, 30532, 92725, 208375, 715437, 2196824, 4932817, 17087917, 52719076, 118137939, 412475333, 1277261765, 2857270465, 10039630707, 31180060771, 69654819267, 245981412469, 765710684488, 1708718651733]

cp's OEIS Frontend

A252577 Number of (3+2)X(n+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