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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
 15, 60, 288, 240, 480, 2304, 960, 7680, 5376, 7680, 5120, 18432, 1920, 15360, 2359296, 122880, 3840, 344064, 240, 122880, 7077888, 81920, 3840, 9437184, 491520, 30720, 786432, 491520, 30720, 150994944, 960, 983040, 12582912, 61440 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 9801, has the property that any number of concatenation of it with self and the digit reversal have same prime divisors. LINKS EXAMPLE a(2) =tau(98019801) = 60. CROSSREFS Cf. A110751, A110752, A110753, A110754. Sequence in context: A064761 A005945 A223337 * A206231 A001756 A284096 Adjacent sequences:  A110752 A110753 A110754 * A110756 A110757 A110758 KEYWORD base,nonn AUTHOR Amarnath Murthy, Aug 11 2005 EXTENSIONS More terms from Alexis Olson (AlexisOlson(AT)gmail.com), Nov 14 2008 More terms from David Wasserman, Dec 18 2008 STATUS approved

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Last modified July 25 23:39 EDT 2021. Contains 346294 sequences. (Running on oeis4.)