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A110755
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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.
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0
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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
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OFFSET
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1,1
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COMMENTS
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9801, has the property that any number of concatenation of it with self and the digit reversal have same prime divisors.
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LINKS
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EXAMPLE
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a(2) =tau(98019801) = 60.
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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More terms from Alexis Olson (AlexisOlson(AT)gmail.com), Nov 14 2008
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STATUS
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approved
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