Number of 3 X n 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.
A268906
Number of 3 X n 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.
Terms
- a(0) =0a(1) =240a(2) =1584a(3) =9720a(4) =54936a(5) =299088a(6) =1585800a(7) =8244288a(8) =42216696a(9) =213602256a(10) =1070280936a(11) =5319700704a(12) =26262038232a(13) =128900271600a(14) =629516497608
External references
- oeis: A268906