Erroneous version of A178674.

A119626

Erroneous version of A178674.

Terms

    a(0) =6a(1) =12a(2) =30a(3) =84a(4) =246a(5) =732a(6) =2790a(7) =8364a(8) =25086a(9) =75252a(10) =225750a(11) =677264

External references