Number of (n+2)X9 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.
A185475
Number of (n+2)X9 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.
Terms
- a(0) =336690a(1) =3212372a(2) =20411234a(3) =100908633a(4) =416227164a(5) =1497314456a(6) =4845252741a(7) =14425457557a(8) =40183952539a(9) =106069534256a(10) =267851235385a(11) =651716593546
External references
- oeis: A185475