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Search: id:A128456
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| 2, 7, 311, 127, 23, 157, 7563707819165039903, 75368484119, 47, 9629, 311, 25679, 821
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OFFSET
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1,1
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COMMENT
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a(n) coincides with A128357(n) from n = 2 up to n = 6.
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FORMULA
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a(n) = A128452(prime(n)+1)/prime(n).
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CROSSREFS
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Cf. A128452 = least number k>n such that k^2 divides n^k - 1, A128357, A128356 = least number k>1 (that is not the power of prime p) such that k divides (p+1)^k-1, where p = prime[n]. Cf. A127103, A127104, A127105, A127106, A127107, A127102, A127101, A127100, A127092, A128393, A128394, A128395, A128396, A128397, A128398, A128399, A128400, A128401, A128402, A128403, A128404.
Sequence in context: A013058 A013097 A012987 this_sequence A137666 A137665 A128466
Adjacent sequences: A128453 A128454 A128455 this_sequence A128457 A128458 A128459
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KEYWORD
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hard,more,nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Mar 05 2007, Mar 09 2007
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