Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 or 00000001.

A259639

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 or 00000001.

Terms

    a(0) =236a(1) =813a(2) =3849a(3) =12348a(4) =44500a(5) =182654a(6) =670088a(7) =2436036a(8) =9361060a(9) =35240824a(10) =130549550a(11) =491638762a(12) =1851623400a(13) =6921303290a(14) =25956767494a(15) =97538420980a(16) =365652086782

External references