Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00010101 or 01010101.
A261291
Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00010101 or 01010101.
Terms
- a(0) =1015a(1) =1361a(2) =4715a(3) =14106a(4) =48435a(5) =153144a(6) =561724a(7) =1703644a(8) =6132232a(9) =19020918a(10) =68690527a(11) =210960310a(12) =762494362a(13) =2350497978a(14) =8485691418a(15) =26128594224a(16) =94398007523a(17) =290731525710
External references
- oeis: A261291