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A115553 Numbers n such that the concatenation of n with 9*n gives a square. 0
2041, 8164, 2366863905325444, 5325443786982249, 9467455621301776, 2040816326530612244897959183673469387755102041, 8163265306122448979591836734693877551020408164 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

2041_18369 = 14287^2.

CROSSREFS

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A015158 A015286 A172594 * A068264 A024021 A298756

Adjacent sequences:  A115550 A115551 A115552 * A115554 A115555 A115556

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 25 2006

STATUS

approved

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Last modified February 21 20:09 EST 2020. Contains 332110 sequences. (Running on oeis4.)