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

A259642

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

Terms

    a(0) =18a(1) =29a(2) =29a(3) =69a(4) =64a(5) =69a(6) =133a(7) =171a(8) =171a(9) =133a(10) =236a(11) =365a(12) =581a(13) =365a(14) =236a(15) =472a(16) =813a(17) =1483a(18) =1483a(19) =813a(20) =472a(21) =940a(22) =1964a(23) =3849a(24) =4146a(25) =3849a(26) =1964a(27) =940a(28) =1781a(29) =4499

External references