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A132927
Concatenation of first n elements of the divisor function d(n), where d(n) is the number of divisors of n.
0
1, 12, 122, 1223, 12232, 122324, 1223242, 12232424, 122324243, 1223242434, 12232424342, 122324243426, 1223242434262, 12232424342624, 122324243426244, 1223242434262445, 12232424342624452, 122324243426244526
OFFSET
1,2
MATHEMATICA
With[{c=DivisorSigma[0, Range[30]]}, Table[FromDigits[Take[c, n]], {n, 20}]] (* Harvey P. Dale, Jul 13 2012 *)
CROSSREFS
d(n): A000005. Cf. A007908, A019518.
Sequence in context: A037551 A134584 A090843 * A113574 A255307 A199592
KEYWORD
easy,nonn,base
AUTHOR
Omar E. Pol, Sep 05 2007
STATUS
approved