Number of n X 2 0..1 arrays with every element unequal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

A305091

Number of n X 2 0..1 arrays with every element unequal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =3a(2) =9a(3) =10a(4) =27a(5) =109a(6) =168a(7) =349a(8) =1229a(9) =2490a(10) =4767a(11) =14401a(12) =33504a(13) =66377a(14) =175249a(15) =433386a(16) =909235a(17) =2208549a(18) =5522840a(19) =12201285a(20) =28458341a(21) =70294586a(22) =161026423a(23) =370622297a(24) =898784848a(25) =2102285073a(26) =4841334921a(27) =11557476010a(28) =27287134763a(29) =63194732573

External references