A087700 - OEIS

A087700

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

1, 1, 449, 1, 61206166658506517441, 359

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OFFSET

1,3

COMMENTS

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

LINKS

EXAMPLE

1,11,11449,114491, etc. have 1, 2, 3 and 4 divisors respectively.

11449= 107^2, 114491 = 13*8807.

CROSSREFS

KEYWORD

base,easy,nonn

AUTHOR

EXTENSIONS

One more term from David Wasserman, Jun 16 2005

STATUS

approved