A252570 - cp's OEIS frontend

A252570 Number of (n+2)X(4+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	1694
2	3441
3	9051
4	25882
5	88844
6	263046
7	802760
8	2655311
9	7860183
10	24273030
11	79767276
12	236117012
13	730342433
14	2398390660
15	7098703610
16	21963448780
17	72127785139
18	213445574577
19	660482900457
20	2169282202310
21	6418274172794

[1694, 3441, 9051, 25882, 88844, 263046, 802760, 2655311, 7860183, 24273030, 79767276, 236117012, 730342433, 2398390660, 7098703610, 21963448780, 72127785139, 213445574577, 660482900457, 2169282202310, 6418274172794]

cp's OEIS Frontend

A252570 Number of (n+2)X(4+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