Number of 3Xn 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303526
Number of 3Xn 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =6a(2) =18a(3) =37a(4) =80a(5) =286a(6) =916a(7) =2532a(8) =7477a(9) =24285a(10) =76820a(11) =235117a(12) =731307a(13) =2316410a(14) =7294592a(15) =22810317a(16) =71569571a(17) =225378484a(18) =708826544a(19) =2225946457a(20) =6995090976a(21) =21998860077a(22) =69164809009a(23) =217385283885a(24) =683342646350
External references
- oeis: A303526