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A087024
Number of divisors of n-th cyclic number.
5
32, 384, 1280, 576, 1536, 384, 1536, 4194304, 16777216, 3538944, 1769472, 110592, 221184, 13824, 6912, 48318382080, 9663676416, 3538944, 75497472, 14155776, 56623104, 884736, 55296, 57982058496, 3710851743744, 37748736, 695784701952, 27648, 27648, 2654208
OFFSET
1,1
COMMENTS
Calculated with Dario Alpern's ECM.
Extended using factors of 10^(A001913(n)-1)-1, see Kamada link.
LINKS
Max Alekseyev, Table of n, a(n) for n = 1..51 (first 42 terms from Ray Chandler)
Eric Weisstein's World of Mathematics, Cyclic Number
Eric Weisstein's World of Mathematics, Divisor Function
FORMULA
a(n) = A000005(A004042(n+1)).
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jul 30 2003
EXTENSIONS
a(12)-a(42) from Ray Chandler, Nov 16 2011
STATUS
approved