Re A013525 ...and 35+ other cosec expansions?

N. J. A. Sloane njas at
Thu Dec 16 18:43:54 CET 2004

Responding to Ralf's message:

I would like to change the description, not the sequence!

So we do 2 things:

1. keep the sequence and the A-number, but make the 
%N line match it.

2. And then give the sequence that matches the %N line as a new

In the case of A013525 we already have an alternative definition
available, thanks to Ralf:

%C A013525 Conjecture: for n>0, a(n) = 1/2 * (A000364(n) - 1). - Ralf Stephan (ralf(AT), Jan 30 2004


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