Number of (n+2) X 4 binary arrays with each 3 X 3 subblock having rows and columns in lexicographically nondecreasing order.
A184541
Number of (n+2) X 4 binary arrays with each 3 X 3 subblock having rows and columns in lexicographically nondecreasing order.
Terms
- a(0) =89a(1) =193a(2) =340a(3) =537a(4) =792a(5) =1114a(6) =1513a(7) =2000a(8) =2587a(9) =3287a(10) =4114a(11) =5083a(12) =6210a(13) =7512a(14) =9007a(15) =10714a(16) =12653a(17) =14845a(18) =17312a(19) =20077a(20) =23164a(21) =26598a(22) =30405a(23) =34612a(24) =39247a(25) =44339a(26) =49918a(27) =56015a(28) =62662a(29) =69892
External references
- oeis: A184541