Number of (n+2) X (3+2) 0..2 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 or 4.
A252027
Number of (n+2) X (3+2) 0..2 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 or 4.
Terms
- a(0) =357a(1) =781a(2) =2206a(3) =7182a(4) =24664a(5) =85199a(6) =295050a(7) =1022761a(8) =3550805a(9) =12331430a(10) =42824128a(11) =148745714a(12) =516732733a(13) =1795122228a(14) =6236192559a(15) =21664447059a(16) =75262834840a(17) =261466468666a(18) =908345208354
External references
- oeis: A252027