Number of nX5 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303311
Number of nX5 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =7a(2) =24a(3) =50a(4) =139a(5) =349a(6) =853a(7) =2180a(8) =5525a(9) =13824a(10) =34900a(11) =88161a(12) =221923a(13) =559409a(14) =1411020a(15) =3556271a(16) =8964218a(17) =22600998a(18) =56974213a(19) =143622769a(20) =362071261a(21) =912756908a(22) =2300972077a(23) =5800604608a(24) =14622927344a(25) =36863258801a(26) =92929626827a(27) =234268970653
External references
- oeis: A303311