Number of nX5 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
A223946
Number of nX5 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
Terms
- a(0) =6a(1) =36a(2) =157a(3) =558a(4) =1821a(5) =5951a(6) =20275a(7) =71653a(8) =257568a(9) =928047a(10) =3335267a(11) =11962223a(12) =42897410a(13) =153982177a(14) =553329976a(15) =1989825264a(16) =7158056447a(17) =25752911149a(18) =92656210922a(19) =333378246553
External references
- oeis: A223946