Erroneous version of A000136.

A195645

Erroneous version of A000136.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =16a(4) =50a(5) =144a(6) =462a(7) =1392a(8) =4356a(9) =14060a(10) =46310a(11) =146376

External references