

A110752


a(n) = Tau(N), where N = the number obtained as a concatenation of 1089 with itself n times. Tau(n) = number of divisors of n.


3



9, 36, 192, 144, 288, 1536, 576, 4608, 3840, 4608, 3072, 12288, 1152, 9216, 1572864, 73728, 2304, 245760, 144, 73728, 4718592, 49152, 2304, 6291456, 294912, 18432, 589824, 294912, 18432, 100663296
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OFFSET

1,1


COMMENTS

1089 has the property that any number of concatenation of it with self and the digit reversal have same prime divisors.


LINKS

Table of n, a(n) for n=1..30.


EXAMPLE

a(2) =tau(10891089) = 36.


MATHEMATICA

k = 0; Do[k = 10^4 * k + 1089; Print[DivisorSigma[0, k]], {n, 1, 30}] (Propper)


CROSSREFS

Cf. A110751, A110753.
Sequence in context: A231431 A002063 A075674 * A094973 A038780 A073984
Adjacent sequences: A110749 A110750 A110751 * A110753 A110754 A110755


KEYWORD

base,nonn


AUTHOR

Amarnath Murthy, Aug 11 2005


EXTENSIONS

More terms from Ryan Propper, Oct 15 2005


STATUS

approved



