Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001001.
A260293
Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001001.
Terms
- a(0) =4762a(1) =8550a(2) =21028a(3) =45596a(4) =62980a(5) =168582a(6) =385280a(7) =635774a(8) =1454932a(9) =3865506a(10) =7077140a(11) =13911248a(12) =37767640a(13) =80433874a(14) =146256972a(15) =363211496a(16) =873338176a(17) =1637204674a(18) =3569621244a(19) =9024085554a(20) =18468136328a(21) =36852868032a(22) =90530978268
External references
- oeis: A260293