Number of nX4 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.
A268805
Number of nX4 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =60a(1) =290a(2) =1202a(3) =5848a(4) =28452a(5) =135912a(6) =640926a(7) =2990786a(8) =13835892a(9) =63544542a(10) =290056316a(11) =1317009868a(12) =5952527788a(13) =26795651036a(14) =120193389832a(15) =537427198324
External references
- oeis: A268805