Number of nX3 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A302872

Number of nX3 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =11a(2) =17a(3) =37a(4) =82a(5) =209a(6) =536a(7) =1549a(8) =4513a(9) =13980a(10) =44424a(11) =142457a(12) =463592a(13) =1518144a(14) =4985864a(15) =16423493a(16) =54170895a(17) =178797985a(18) =590488247a(19) =1950654770a(20) =6444889749a(21) =21296082916a(22) =70373480203a(23) =232558689443a(24) =768538881502

External references