Numbers n such that 2*n^2 - 1 is a square.
1, 5, 29, 169, 985, 5741, 33461, 195025, 1136689, 6625109, 38613965, 225058681
3 seqfan posts
Mon Oct 24 16:12:35 CEST 2011 [seqfan] Re: Arithmetic progressions of squares
Sun Dec 26 17:32:03 CET 2010 [seqfan] Re: Two elusive triangular numbers
Sun Jan 11 23:36:02 CET 2009 [seqfan] Index of linear recurrences
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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