Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001.
A260247
Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001.
Terms
- a(0) =10110a(1) =18837a(2) =56634a(3) =85491a(4) =238852a(5) =906498a(6) =1606456a(7) =3601412a(8) =12214696a(9) =29652462a(10) =59024564a(11) =170234202a(12) =476307636a(13) =1016593000a(14) =2509402408a(15) =7209266008a(16) =17002833240a(17) =39321041096a(18) =107511503760a(19) =273221762146a(20) =633085054356
External references
- oeis: A260247