Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.

A304474

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =12a(2) =19a(3) =37a(4) =94a(5) =202a(6) =428a(7) =965a(8) =2134a(9) =4692a(10) =10385a(11) =22939a(12) =50685a(13) =112126a(14) =247801a(15) =547629a(16) =1210890a(17) =2677120a(18) =5917928a(19) =13083023a(20) =28924080a(21) =63944514a(22) =141366373a(23) =312528443a(24) =690930487a(25) =1527496422a(26) =3376954419a(27) =7465688699a(28) =16504985560

External references