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

A300883

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

Terms

    a(0) =3a(1) =2a(2) =4a(3) =8a(4) =17a(5) =57a(6) =148a(7) =356a(8) =864a(9) =2272a(10) =5766a(11) =14438a(12) =36379a(13) =92632a(14) =234473a(15) =592300a(16) =1497878a(17) =3794198a(18) =9602820a(19) =24292985a(20) =61469034a(21) =155580439a(22) =393724501a(23) =996303601a(24) =2521217660a(25) =6380413994a(26) =16146453573a(27) =40860032492a(28) =103400766211a(29) =261668897174

External references