Number of (n+1)X(7+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge or main diagonally.
A251291
Number of (n+1)X(7+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge or main diagonally.
Terms
- a(0) =1691a(1) =21966a(2) =202882a(3) =2645966a(4) =25654154a(5) =322933003a(6) =3232216177a(7) =39571705178a(8) =405845538185
External references
- oeis: A251291