Number of n X 4 binary arrays with top left element equal to 1 and no two ones adjacent horizontally or antidiagonally.
A228750
Number of n X 4 binary arrays with top left element equal to 1 and no two ones adjacent horizontally or antidiagonally.
Terms
- a(0) =3a(1) =20a(2) =126a(3) =780a(4) =4808a(5) =29608a(6) =182288a(7) =1122240a(8) =6908896a(9) =42533440a(10) =261849728a(11) =1612032128a(12) =9924194048a(13) =61096565760a(14) =376130326016
External references
- oeis: A228750