Number of nX4 0..1 arrays with every element unequal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero.

A303804

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =17a(2) =15a(3) =38a(4) =55a(5) =107a(6) =202a(7) =438a(8) =853a(9) =1858a(10) =3939a(11) =8667a(12) =18603a(13) =41667a(14) =92140a(15) =205636a(16) =455688a(17) =1021747a(18) =2281353a(19) =5111090a(20) =11431713a(21) =25646573a(22) =57451732a(23) =128832642a(24) =288776875a(25) =647818224a(26) =1452633630a(27) =3258392662a(28) =7307981425a(29) =16393919986

External references