A065793 a(1) = 81; 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.

81, 16, 146, 22086, 31071113326, 365107058344463715696, 2684967738644586785227227090233956040549004, 809079884187716191997158821357206898310718837487307207657194711477350102495950972665

Offset: 1

Author

Klaus Brockhaus, Nov 19 2001

Keywords

• base
• nonn

Comments

a(n) = A061359(n+1) for n > 1.

Crossrefs

Cf. A061359, A065691, A065791, A065792.