duplicate hunting, pt. 19

[Ralf Stephan]

> A077934 and A077973
> http://www.research.att.com/~njas/sequences/?q=id:A077934|id:A077973
> (another similar pair: A077893 and A077953)

Obviously (just multiply the g.f. denominator).

> A060543 and A108287
> http://www.research.att.com/~njas/sequences/?q=id:A060543|id:A108287

Yes, from the definition.

> A052509 and A052511
> http://www.research.att.com/~njas/sequences/?q=id:A052509|id:A052511

Yes, from Wouter's formula of A052509.


ralf