Number of (n+2)X(4+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 3 6 or 7.
A251787
Number of (n+2)X(4+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 3 6 or 7.
Terms
- a(0) =6144a(1) =14908a(2) =44504a(3) =149364a(4) =541656a(5) =1765074a(6) =6446816a(7) =24880436a(8) =90369250a(9) =354040208a(10) =1437800720a(11) =5668460910a(12) =23255195002a(13) =97097665658a(14) =400041205158
External references
- oeis: A251787