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A076951
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Smallest k > 0 such that nk-1 is an n-th power, or 0 if no such number exists.
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2
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1, 1, 3, 0, 205, 0, 39991, 0, 57, 5905, 9090909091, 0, 8230246567621, 0, 10371206370520815, 0, 17361641481138401521, 0, 37275544492386193492507, 0, 22706531343006, 0, 326583187044036098379401213863, 0, 45035996273705
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| p divides a(p) for odd primes p. a(p) = A081209(p-1) = p*A081215(p-1) for odd primes p. a(p)/p = A081215(p-1) = {1,41,5713,826446281,633095889817,1021273028302258913,...} - Alexander Adamchuk (alex(AT)kolmogorov.com), Nov 12 2006
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CROSSREFS
| Cf. A076952.
Cf. A081209, A081215.
Sequence in context: A013238 A013243 A013244 * A060282 A060283 A140334
Adjacent sequences: A076948 A076949 A076950 * A076952 A076953 A076954
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KEYWORD
| nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 20 2002
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EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 21 2003
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