Number of n X 4 0..1 arrays with each 1 adjacent to 2 or 5 king-move neighboring 1s.

A296124

Number of n X 4 0..1 arrays with each 1 adjacent to 2 or 5 king-move neighboring 1s.

Terms

    a(0) =1a(1) =13a(2) =30a(3) =74a(4) =287a(5) =841a(6) =2463a(7) =7953a(8) =24428a(9) =74660a(10) =233017a(11) =721069a(12) =2226921a(13) =6907921a(14) =21399342a(15) =66252970a(16) =205308499a(17) =636102161a(18) =1970540971a(19) =6105562057a(20) =18917255184a(21) =58610713832a(22) =181598709121a(23) =562663895105

External references