Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101.

A260924

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101.

Terms

    a(0) =297a(1) =468a(2) =1800a(3) =4522a(4) =11608a(5) =27582a(6) =82766a(7) =191474a(8) =543551a(9) =1291912a(10) =3724868a(11) =8715812a(12) =25061915a(13) =59060378a(14) =169750208a(15) =398939434a(16) =1147482231a(17) =2699112784a(18) =7759824787a(19) =18248954340a(20) =52477167246a(21) =123413127854a(22) =354855957210

External references