%I #4 Mar 30 2012 18:36:55
%S 1,1,3,23,443,23131,3732309,2090705825,4388282355347
%N When convolved with itself and doubled, gives the sequence A000609.
%C Do these numbers have any other interpretation? Are they always integers?
%K nonn
%O 0,3
%A _Paul D. Hanna_, Apr 02 2006