Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010101.

A260838

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010101.

Terms

    a(0) =644a(1) =796a(2) =1560a(3) =2590a(4) =3828a(5) =8646a(6) =16000a(7) =24508a(8) =49816a(9) =103124a(10) =168848a(11) =309802a(12) =649200a(13) =1162556a(14) =2036072a(15) =4109542a(16) =7787612a(17) =13696344a(18) =26404180a(19) =51320598a(20) =92306500a(21) =172258250a(22) =335370864a(23) =618838306a(24) =1136886200a(25) =2187906876a(26) =4116117684

External references