Numbers n such that the concatenation of n with 4*n gives a square.
25721, 28836, 32129, 35600, 39249, 43076, 47081, 51264, 55625, 60164, 64881
3 seqfan posts
Tue Aug 31 15:35:55 CEST 2010 [seqfan] Re: Quadratics in the OEIS
Tue Aug 31 14:30:49 CEST 2010 [seqfan] Re: Quadratics in the OEIS
Tue Aug 31 06:55:07 CEST 2010 [seqfan] Quadratics in the OEIS
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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