A225796 a(1) = 1, a(n) = least proper multiple of a(n-1) which is a concatenation of two or more successive numbers.

1, 12, 456, 415416, 194191194192, 3816727961538167279616, 35270249819024056401913527024981902405640192

Offset

1,2

Links

Paul Tek, Table of n, a(n) for n = 1..11

Paul Tek, PARI program for this sequence

Example

12 is the least proper multiple of 1 in A035333, hence a(2)=12.
456 is the least proper multiple of 12 in A035333, hence a(3)=456.

Prog

(PARI) See Links section.

Crossrefs

Cf. A035333, A094333.

Sequence in context: A239365 A277262 A226358 * A112363 A221032 A221496

Adjacent sequences: A225793 A225794 A225795 * A225797 A225798 A225799

Keyword

nonn,base

Author

Paul Tek, Jul 27 2013

Status

approved