Number of (n+2)X(1+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal sum minus antidiagonal sum unequal to its neighbors horizontally and vertically.
A253733
Number of (n+2)X(1+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal sum minus antidiagonal sum unequal to its neighbors horizontally and vertically.
Terms
- a(0) =218a(1) =720a(2) =2212a(3) =6932a(4) =22236a(5) =70372a(6) =222820a(7) =706884a(8) =2242532a(9) =7110804a(10) =22555544a(11) =71517456a(12) =226861460a(13) =719514384a(14) =2281956628a(15) =7237186788a(16) =22954908172a(17) =72802487404a(18) =230901873532a(19) =732329249252
External references
- oeis: A253733