Number of nX3 0..1 arrays with every element unequal to 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

A305511

Number of nX3 0..1 arrays with every element unequal to 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =2a(2) =5a(3) =6a(4) =8a(5) =19a(6) =33a(7) =60a(8) =107a(9) =204a(10) =375a(11) =677a(12) =1253a(13) =2329a(14) =4252a(15) =7824a(16) =14454a(17) =26591a(18) =48908a(19) =90088a(20) =165947a(21) =305495a(22) =562342a(23) =1035675a(24) =1907146a(25) =3511035a(26) =6465055a(27) =11904935a(28) =21919763a(29) =40360338

External references