Number of nX2 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
A203383
Number of nX2 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =7a(2) =49a(3) =252a(4) =1519a(5) =11585a(6) =86156a(7) =606221a(8) =4325033a(9) =31601858a(10) =230910283a(11) =1678821743a(12) =12222650420a(13) =89226320509a(14) =651653318187
External references
- oeis: A203383