Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000111.

A260065

Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000111.

Terms

    a(0) =256a(1) =594a(2) =1680a(3) =3825a(4) =6714a(5) =16344a(6) =42094a(7) =84761a(8) =173654a(9) =438404a(10) =996340a(11) =2016015a(12) =4598146a(13) =11017398a(14) =23615180a(15) =50616069a(16) =118597002a(17) =268738044a(18) =575235736a(19) =1289517999a(20) =2973476636a(21) =6546511470a(22) =14328637582a(23) =32602124265a(24) =73467292150

External references