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A087025
Sum of divisors of n-th cyclic number.
5
255360, 17205180696931968, 1951532915603927040, 12430490030984319840000, 9956179688423375044684800000, 6080633705911286890368486450696472902951229440, 4809378729404888733987843426081300724182624228548100710400
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) = A000203(A004042(n+1)).
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jul 30 2003
EXTENSIONS
a(12)-a(42) from Ray Chandler, Nov 16 2011
STATUS
approved