A115547 Numbers k such that the concatenation of 7*k with k gives a square.

11909262759924385633270321361058601134215500945179584121, 21172022684310018903591682419659735349716446124763705104, 33081285444234404536862003780718336483931947069943289225, 47637051039697542533081285444234404536862003780718336484

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Crossrefs

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A095502 A115453 A095504 * A115548 A095506 A291354

Adjacent sequences: A115544 A115545 A115546 * A115548 A115549 A115550

Keyword

nonn,base

Author

Giovanni Resta, Jan 25 2006

Status

approved