A065691 a(1) = 0; for n > 1, a(n) is the smallest integer > 0 such that the concatenation a(n)a(n-1)...a(2)a(1) is a square.

0, 10, 8, 16, 146, 22086, 31071113326, 365107058344463715696, 2684967738644586785227227090233956040549004, 809079884187716191997158821357206898310718837487307207657194711477350102495950972665

Offset

1,2

Comments

a(n) = A061359(n-1) for n > 2.

Links

Table of n, a(n) for n=1..10.

Crossrefs

Cf. A050634, A050635, A061359, A065689, A065690.

Sequence in context: A110934 A291424 A357473 * A147974 A213553 A317813

Adjacent sequences: A065688 A065689 A065690 * A065692 A065693 A065694

Keyword

base,nonn

Author

Klaus Brockhaus, Nov 17 2001

Status

approved