Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001011.

A260498

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001011.

Terms

    a(0) =722a(1) =942a(2) =2420a(3) =4471a(4) =5848a(5) =13651a(6) =30590a(7) =44345a(8) =86146a(9) =202955a(10) =340992a(11) =594727a(12) =1337766a(13) =2512086a(14) =4297330a(15) =8969180a(16) =17849718a(17) =31376221a(18) =61476268a(19) =124563766a(20) =227374104a(21) =429574195a(22) =863869040a(23) =1628973770a(24) =3037581452a(25) =5999977346

External references