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A088038 Smallest cube k == 1 (mod some n-th power), k > 1. 1
8, 64, 729, 4913, 35937, 274625, 2146689, 16974593, 135005697, 1076890625, 8602523649, 68769820673, 549957165057, 4398851866625, 35187593412609, 281487861809153, 2251851353686017, 18014604668698625, 144116012711149569 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
In most of the cases the n-th power that divides a(n)-1 is 2^n.
LINKS
FORMULA
Empirical G.f.: -x*(3904*x^5-6104*x^4+2502*x^3-329*x^2+56*x-8) / ((x-1)*(2*x-1)*(4*x-1)*(8*x-1)). [Colin Barker, Feb 05 2013]
EXAMPLE
a(4) = 4913 = 17^3 and 4912 = (2^4)*307.
CROSSREFS
Cf. A088039.
Sequence in context: A204212 A238724 A318640 * A061435 A133054 A098560
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Sep 19 2003
EXTENSIONS
More terms from Ray Chandler, Oct 04 2003
STATUS
approved

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Last modified March 29 03:41 EDT 2024. Contains 371264 sequences. (Running on oeis4.)