Number of nX3 0..1 arrays with every element equal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

A298624

Number of nX3 0..1 arrays with every element equal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =3a(2) =8a(3) =26a(4) =138a(5) =611a(6) =2880a(7) =13727a(8) =65070a(9) =310816a(10) =1482870a(11) =7081007a(12) =33819984a(13) =161533363a(14) =771590878a(15) =3685656306a(16) =17605479026a(17) =84097488439a(18) =401715732434

External references