Primes of the form x^2+4*x*y-y^2.
5, 11, 19, 29, 31, 41, 59, 61, 71, 79, 89, 101, 109, 131, 139, 149, 151, 179, 181, 191
2 seqfan posts
Thu Jul 15 15:45:55 CEST 2010 [seqfan] A141158 = A038872 (?)
Sat Oct 10 20:36:40 CEST 2009 [seqfan] Re: A006451 = n such that n*(n+1)/2+1 is square?
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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