Number of side-n hexagonal 0..4 arrays with values nondecreasing E, SW and SE.
A216933
Number of side-n hexagonal 0..4 arrays with values nondecreasing E, SW and SE.
Terms
- a(0) =5a(1) =606a(2) =175869a(3) =64697626a(4) =25604764159
External references
- oeis: A216933