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A115434 Numbers n such that the concatenation of n with n-7 gives a square. 11
8, 16, 1337032, 2084503, 2953232, 4023943, 1330033613070195328, 4036108433661798551, 8283744867954114232, 6247320195351414276186411625291, 9452080202814205132771066881607 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

4023943_4023936 = 6343456^2.

CROSSREFS

Cf. A030465, A102567, A115426, A115437, A115428, A115429, A115430, A115431, A115432, A115433, A115435, A115436, A115445.

Sequence in context: A236285 A247850 A024280 * A024107 A234839 A066554

Adjacent sequences:  A115431 A115432 A115433 * A115435 A115436 A115437

KEYWORD

base,nonn

AUTHOR

Giovanni Resta, Jan 25 2006

STATUS

approved

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Last modified November 14 07:13 EST 2019. Contains 329111 sequences. (Running on oeis4.)