Walks on hexagonal lattice using each point at most twice.

A007274

Walks on hexagonal lattice using each point at most twice.

Terms

    a(0) =1a(1) =6a(2) =36a(3) =216a(4) =1260a(5) =7206a(6) =40650a(7) =227256a(8) =1262832a(9) =6983730a(10) =38470224a(11) =211220814a(12) =1156489782a(13) =6317095284a(14) =34435495872a(15) =187380150468

External references