Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000011.
A259715
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000011.
Terms
- a(0) =32a(1) =95a(2) =568a(3) =2059a(4) =3120a(5) =16294a(6) =75200a(7) =165976a(8) =671824a(9) =3555562a(10) =11248808a(11) =39460604a(12) =210749488a(13) =895687412a(14) =3251082768a(15) =16440249886a(16) =84298558576
External references
- oeis: A259715