Number of nX3 0..1 arrays with every element unequal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

A304053

Number of nX3 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) =1a(1) =11a(2) =6a(3) =18a(4) =32a(5) =60a(6) =124a(7) =288a(8) =598a(9) =1266a(10) =2910a(11) =6362a(12) =13924a(13) =31578a(14) =70292a(15) =156670a(16) =353098a(17) =791762a(18) =1776560a(19) =3999190a(20) =8991152a(21) =20221266a(22) =45520396a(23) =102442546a(24) =230580304a(25) =519141320a(26) =1168761696a(27) =2631446768a(28) =5925181452a(29) =13341570650

External references