Number of nX4 0..1 arrays with every element unequal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

A304054

Number of nX4 0..1 arrays with every element unequal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =10a(2) =18a(3) =26a(4) =155a(5) =427a(6) =1122a(7) =4109a(8) =13836a(9) =42480a(10) =146237a(11) =498032a(12) =1644227a(13) =5621834a(14) =19248035a(15) =65246778a(16) =223753918a(17) =768804086a(18) =2632716730a(19) =9054378653a(20) =31173668791a(21) =107204441078a(22) =369309784745

External references