Extending A053169?

[David Wilson]

If you look at http://mathworld.wolfram.com/TangentNumber.html

A000061 seems to be the first elements of the sequences given in the table 
at the bottom of the article, which, in the nomenclature of the article, 
would translate to A000061(n) = d(n, 1) where d(a,n) is defined in equation 
(4) which is lifted from the Shanks reference. Unfortunately, (4) involves a 
Dirichlet series, with which I have little familiarity.

----- Original Message ----- 
From: "N. J. A. Sloane" <njas at research.att.com>
To: <seqfan at ext.jussieu.fr>
Cc: <jonscho at hiwaay.net>; <njas at research.att.com>
Sent: Saturday, May 26, 2007 8:51 AM
Subject: Re: Extending A053169?


> It would be nice to have a more precise
> definition of A000061, which has been in the OEIS
> since the punched card days.