Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A257421
Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =10684a(1) =27244a(2) =117324a(3) =449022a(4) =1290910a(5) =3917190a(6) =11883298a(7) =33766938a(8) =96478988a(9) =272492320a(10) =759572898a(11) =2120432736a(12) =5906478692a(13) =16369510406a(14) =45291725362a(15) =125081097988a(16) =344778228786a(17) =949378792506
External references
- oeis: A257421