Number of (n+2)X3 0..4 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.
A186088
Number of (n+2)X3 0..4 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.
Terms
- a(0) =102251a(1) =1252889a(2) =11258613a(3) =83378583a(4) =531218757a(5) =2985984444a(6) =15084070635a(7) =69482992431a(8) =295278398390
External references
- oeis: A186088