Number of nX6 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
A223947
Number of nX6 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
Terms
- a(0) =7a(1) =49a(2) =241a(3) =928a(4) =3115a(5) =9919a(6) =31899a(7) =106838a(8) =372791a(9) =1333858a(10) =4817747a(11) =17407255a(12) =62752228a(13) =225884852a(14) =813221202a(15) =2931336019a(16) =10582353096a(17) =38251831384a(18) =138386374911a(19) =500895790541
External references
- oeis: A223947