Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00100101 or 01010101.
A261264
Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00100101 or 01010101.
Terms
- a(0) =1123a(1) =1436a(2) =6795a(3) =26072a(4) =85617a(5) =274100a(6) =1062118a(7) =3488342a(8) =12721239a(9) =41920830a(10) =155836702a(11) =510815882a(12) =1888254136a(13) =6209495774a(14) =22984035493a(15) =75470825466a(16) =279286307313a(17) =917683052186
External references
- oeis: A261264