Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4 or 7 king-move adjacent elements, with upper left element zero.

A304854

Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =21a(1) =127a(2) =91a(3) =264a(4) =731a(5) =2073a(6) =6750a(7) =23642a(8) =80209a(9) =281982a(10) =1002046a(11) =3608377a(12) =12962477a(13) =46720095a(14) =168772741a(15) =610745581a(16) =2209961264a(17) =8001134385a(18) =28984697206a(19) =105018572887a(20) =380523339190

External references