Number of (n+2)X6 0..4 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.
A186091
Number of (n+2)X6 0..4 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.
Terms
- a(0) =83378583a(1) =2743553694a(2) =55707179395a(3) =837192826927
External references
- oeis: A186091