Numbers n such that the concatenation of n with n+4 gives a square.
96, 205, 300, 477, 732, 1920, 3157, 52896, 120085, 427020, 8264460, 88581312
3 seqfan posts
Fri Apr 30 17:44:17 CEST 2010 [seqfan] Concatenation: summary
Fri Apr 23 18:06:40 CEST 2010 [seqfan] Re: Concatenation
Fri Apr 23 17:40:06 CEST 2010 [seqfan] Concatenation
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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