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A115540 Numbers k such that k^2 is the concatenation of two numbers m and 5*m. 0
14285714285714285715, 28571428571428571430, 42857142857142857145, 1627906976744186046511627906976745, 1860465116279069767441860465116280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

14285714285714285715^2 = 2040816326530612245_10204081632653061225.

CROSSREFS

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A238359 A253389 A257307 * A104263 A221558 A114993

Adjacent sequences:  A115537 A115538 A115539 * A115541 A115542 A115543

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 25 2006

STATUS

approved

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Last modified August 10 06:08 EDT 2022. Contains 356029 sequences. (Running on oeis4.)