Number of n X 3 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.
A269084
Number of n X 3 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =7a(1) =30a(2) =114a(3) =428a(4) =1531a(5) =5387a(6) =18590a(7) =63347a(8) =213490a(9) =713237a(10) =2365217a(11) =7794642a(12) =25549763a(13) =83359179a(14) =270860625a(15) =876943006a(16) =2830104798a(17) =9107202178a(18) =29230933367a(19) =93601324315a(20) =299085155918a(21) =953808773503
External references
- oeis: A269084