Number of nX3 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303249
Number of nX3 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =14a(2) =49a(3) =250a(4) =1183a(5) =5918a(6) =28680a(7) =141255a(8) =691968a(9) =3391358a(10) =16627204a(11) =81517689a(12) =399591042a(13) =1958997017a(14) =9603668921a(15) =47080079771a(16) =230803211309
External references
- oeis: A303249