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A110755 a(n) = Tau(N), where N = the number obtained as a concatenation of 9801 with itself n times. Tau(n) = number of divisors of n. 0

%I

%S 15,60,288,240,480,2304,960,7680,5376,7680,5120,18432,1920,15360,

%T 2359296,122880,3840,344064,240,122880,7077888,81920,3840,9437184,

%U 491520,30720,786432,491520,30720,150994944,960,983040,12582912,61440

%N a(n) = Tau(N), where N = the number obtained as a concatenation of 9801 with itself n times. Tau(n) = number of divisors of n.

%C 9801, has the property that any number of concatenation of it with self and the digit reversal have same prime divisors.

%e a(2) =tau(98019801) = 60.

%Y Cf. A110751, A110752, A110753, A110754.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, Aug 11 2005

%E More terms from Alexis Olson (AlexisOlson(AT)gmail.com), Nov 14 2008

%E More terms from _David Wasserman_, Dec 18 2008

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Last modified September 19 00:22 EDT 2021. Contains 347549 sequences. (Running on oeis4.)