login
A087700
a(1) = 1, a(n) = smallest number such that the n-th partial concatenation has n divisors.
1
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
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
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy, Sep 26 2003
EXTENSIONS
One more term from David Wasserman, Jun 16 2005
STATUS
approved