A252576 - cp's OEIS frontend

A252576 Number of (2+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	742
2	868
3	1795
4	3441
5	8980
6	23007
7	47737
8	133142
9	358343
10	747913
11	2133162
12	5930143
13	12407892
14	35927539
15	102193578
16	214180250
17	626625460
18	1809891284
19	3797310562
20	11184658108
21	32620331477
22	68486288857
23	202566746459
24	594329457551

[742, 868, 1795, 3441, 8980, 23007, 47737, 133142, 358343, 747913, 2133162, 5930143, 12407892, 35927539, 102193578, 214180250, 626625460, 1809891284, 3797310562, 11184658108, 32620331477, 68486288857, 202566746459, 594329457551]

cp's OEIS Frontend

A252576 Number of (2+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