A087700 a(1) = 1, a(n) = smallest number such that the n-th partial concatenation has n divisors.

1, 1, 449, 1, 61206166658506517441, 359

Offset

1,3

Comments

Next term is about 6.4*10^150 and is too large to include. - David Wasserman, Jun 16 2005

Links

Table of n, a(n) for n=1..6.

Example

1,11,11449,114491, etc. have 1, 2, 3 and 4 divisors respectively.
11449= 107^2, 114491 = 13*8807.

Crossrefs

Sequence in context: A229370 A174154 A071104 * A344827 A345314 A107666

Adjacent sequences: A087697 A087698 A087699 * A087701 A087702 A087703

Keyword

base,easy,nonn

Author

Amarnath Murthy, Sep 26 2003

Extensions

One more term from David Wasserman, Jun 16 2005

Status

approved