A110802 a(1) =1, a(n) = k* concatenation of a(1), a(2), ...a(n-1), where k is the number of digits in the concatenation.

1, 1, 22, 4488, 89795904, 17959182236734464, 3704081336326483792653013812237312, 75204075616325580032652098612091128173449533874414107751925419899904

Offset

1,3

Links

Table of n, a(n) for n=1..8.

Example

a(2) = 1*1 = 1, a(3) = 11*2 = 22, a(4) = 1122*4 = 4488.

Crossrefs

Sequence in context: A362901 A218719 A109776 * A200460 A202054 A279298

Adjacent sequences: A110799 A110800 A110801 * A110803 A110804 A110805

Keyword

base,easy,nonn

Author

Amarnath Murthy, Aug 14 2005

Extensions

More terms from Joshua Zucker, May 03 2006

Status

approved