Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.
A252008
Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.
Terms
- a(0) =756a(1) =1168a(2) =1110a(3) =1618a(4) =1970a(5) =2458a(6) =3246a(7) =4410a(8) =5802a(9) =7874a(10) =10910a(11) =14594a(12) =19726a(13) =27894a(14) =38154a(15) =52258a(16) =74678a(17) =102670a(18) =141578a(19) =205578a(20) =285918a(21) =396882a(22) =580242a(23) =810258a(24) =1131350a(25) =1669190a(26) =2342830a(27) =3281074a(28) =4860118a(29) =6840566
External references
- oeis: A252008