Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000111.
A260069
Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000111.
Terms
- a(0) =5088a(1) =13366a(2) =42094a(3) =89948a(4) =185370a(5) =660896a(6) =1838884a(7) =3846432a(8) =10411860a(9) =34278032a(10) =85219868a(11) =194549646a(12) =586417692a(13) =1722858971a(14) =4107474218a(15) =10494264900a(16) =31635757784a(17) =85184012548a(18) =207122994200a(19) =570030592938
External references
- oeis: A260069