Number of n X 3 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

A297954

Number of n X 3 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =7a(2) =15a(3) =25a(4) =47a(5) =109a(6) =245a(7) =545a(8) =1253a(9) =2859a(10) =6557a(11) =15131a(12) =34879a(13) =80643a(14) =186663a(15) =432253a(16) =1002043a(17) =2323805a(18) =5391149a(19) =12511905a(20) =29043489a(21) =67430735a(22) =156577101a(23) =363614071a(24) =844480819a(25) =1961394067a(26) =4555748943a(27) =10582066605a(28) =24580613559a(29) =57098398457

External references