A115434 Numbers k such that the concatenation of k with k-7 gives a square.

8, 16, 1337032, 2084503, 2953232, 4023943, 1330033613070195328, 4036108433661798551, 8283744867954114232, 6247320195351414276186411625291, 9452080202814205132771066881607

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