Number of nX5 0..1 arrays with every element equal to 0, 1 or 4 horizontally or vertically adjacent elements, with upper left element zero.

A301659

Number of nX5 0..1 arrays with every element equal to 0, 1 or 4 horizontally or vertically adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =9a(2) =15a(3) =24a(4) =46a(5) =99a(6) =223a(7) =528a(8) =1268a(9) =3085a(10) =7557a(11) =18564a(12) =45712a(13) =112683a(14) =277951a(15) =685904a(16) =1692980a(17) =4179275a(18) =10317757a(19) =25473562a(20) =62893616a(21) =155285391a(22) =383406003a(23) =946650748a(24) =2337341394a(25) =5771057703a(26) =14249158391a(27) =35182226914a(28) =86867560256

External references