Number of (n+2) X (7+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101.
A260926
Number of (n+2) X (7+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101.
Terms
- a(0) =883a(1) =1528a(2) =7680a(3) =25690a(4) =82766a(5) =253264a(6) =971381a(7) =2901724a(8) =10470430a(9) =32212024a(10) =118158061a(11) =357207408a(12) =1307239067a(13) =3983812562a(14) =14565958591a(15) =44252940160a(16) =161970281879a(17) =492560981246
External references
- oeis: A260926