[seqfan] deranged pairings

[Christian G.Bower]

Wouter Meeussen pointed out a typo in my message. (Thanks Wouter).

I wrote:
> The egf of a(n) is 1/(e^x^2 * sqrt(1-x^2)).
> The egf of b(n) is 1/sqrt(1-x^2).

I meant to write:
> The egf of a(n) is 1/(sqrt(e^x^2 * (1-x^2))).
...

Best regards,
Christian


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