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Search: id:A115549
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A115549 Numbers n such that the concatenation of n with 8*n gives a square. +0
1
3, 12, 28, 63, 112, 278, 1112, 2778, 11112, 27778, 111112, 277778, 1111112, 2777778, 4938272, 7716050, 11111112, 12802888, 13151250, 13504288, 13862002, 14224392, 14591458, 14963200, 15339618, 15720712, 16106482, 16496928 (list; graph; listen)
OFFSET

1,1
EXAMPLE

3_24 = 18^2.

CROSSREFS

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A083539 A066643 A140065 this_sequence A005995 A034503 A026557

Adjacent sequences: A115546 A115547 A115548 this_sequence A115550 A115551 A115552

KEYWORD

nonn,base

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 25 2006

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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