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A115436 Numbers n such that the concatenation of n with n-9 gives a square. 11
50, 5234, 9410, 638370, 994010, 12477933, 41829698, 99940010, 1087279650, 4492494893, 6226356365, 7765453730, 9999400010, 806057802450, 842377434050, 960398039610, 999994000010, 21338126513658, 24752544267698 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

638370_638361 = 798981^2.

CROSSREFS

Cf. A030465, A102567, A115426, A115437, A115428, A115429, A115430, A115431, A115432, A115433, A115434, A115435, A115447.

Sequence in context: A231937 A230477 A320099 * A184555 A301992 A229753

Adjacent sequences:  A115433 A115434 A115435 * A115437 A115438 A115439

KEYWORD

base,nonn

AUTHOR

Giovanni Resta, Jan 25 2006

STATUS

approved

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Last modified November 29 23:37 EST 2020. Contains 338780 sequences. (Running on oeis4.)