Number of n X 5 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302725
Number of n X 5 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =3a(1) =27a(2) =74a(3) =287a(4) =1307a(5) =4491a(6) =17828a(7) =80293a(8) =304958a(9) =1254491a(10) =5534905a(11) =22489246a(12) =94732609a(13) =413955598a(14) =1740468900a(15) =7436093945a(16) =32346857005a(17) =138259463124a(18) =595133929409
External references
- oeis: A302725