id:A092681 - OEIS Search Results

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Least number 2k such that p^2 divides the numerator of the Bernoulli number B(2k), where p is the n-th irregular prime, A000928(n).

+0
4

284, 914, 3292, 5768, 228, 12112, 11082, 6302, 11498, 40220, 34724, 51976, 1434, 74750, 67316, 21508, 63532, 39378, 67066, 64012, 91576, 137766, 137552, 105582, 158838, 147660, 175758, 194776, 173842, 102148, 132072, 107112, 127736, 29248 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`The ordered-pair (p(n),a(n)), where p(n) is the n-th irregular prime, is called a second-order irregular pair. Some irregular primes, such as 157, have more than one pair. See A091887 for a count of the number of pairs for each irregular prime.`
	LINKS	`Bernd Kellner, On irregular pairs of higher order (in German)`
	CROSSREFS	`Cf. A035112, A092682.` `Sequence in context: A064964 A108826 A061310 this_sequence A090789 A002046 A108110` `Adjacent sequences: A092678 A092679 A092680 this_sequence A092682 A092683 A092684`
	KEYWORD	`nonn`
	AUTHOR	`T. D. Noe (noe(AT)sspectra.com), Mar 03 2004`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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