Number of (n+2)X4 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.
A186623
Number of (n+2)X4 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.
Terms
- a(0) =317115a(1) =9957573a(2) =313250283a(3) =9626194591a(4) =205142945972
External references
- oeis: A186623