Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 5 or 6 king-move adjacent elements, with upper left element zero.
A304602
Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 5 or 6 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =32a(1) =45a(2) =131a(3) =515a(4) =1726a(5) =6007a(6) =19634a(7) =66861a(8) =231749a(9) =813171a(10) =2823452a(11) =9768312a(12) =33823836a(13) =117404683a(14) =407563521a(15) =1413825126a(16) =4902508706a(17) =17003347781a(18) =58984647937a(19) =204621318633a(20) =709786934909
External references
- oeis: A304602