A061492 a(1) = 8, a(n) = least number such that the concatenation a(n)a(n-1)...a(1) is a cube.

8, 172, 1585108, 4768417578272894, 931322574615480750806365966798663150842303643

Offset

1,1

Links

Table of n, a(n) for n=1..5.

Example

a(1) = 8, a(2) = 172, a(2)a(1) = 1728 = 12^3.

Crossrefs

Cf. A061359, A061361, A061363, A061491.

Sequence in context: A333460 A221060 A303285 * A263461 A215124 A138783

Adjacent sequences: A061489 A061490 A061491 * A061493 A061494 A061495

Keyword

base,nonn

Author

Amarnath Murthy, May 06 2001

Extensions

Corrected and extended by Ulrich Schimke (ulrschimke(AT)aol.com), Nov 06 2001. Next element has 135 digits.

Status

approved