A039914 - OEIS

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A039914

Smallest k>1 such that k(p-1)-1 is divisible by p^2, p=nth prime.

5, 5, 19, 41, 109, 155, 271, 341, 505, 811, 929, 1331, 1639, 1805, 2161, 2755, 3421, 3659, 4421, 4969, 5255, 6161, 6805, 7831, 9311, 10099, 10505, 11341, 11771, 12655, 16001, 17029, 18631, 19181, 22051, 22649, 24491, 26405, 27721, 29755, 31861 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	EXAMPLE	`a(1)=5 because 5(2-1)-1=4 is divisible by 2^2.`
	CROSSREFS	`Cf. A039678.` `Sequence in context: A147141 A146146 A145937 * A201803 A151789 A094338` `Adjacent sequences: A039911 A039912 A039913 * A039915 A039916 A039917`
	KEYWORD	`nonn`
	AUTHOR	`Felice Russo (frusso(AT)micron.com)`
	EXTENSIONS	`Added constraint on k to the definition, otherwise a(1)=1 - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 10 2010`

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Last modified February 15 02:38 EST 2012. Contains 205689 sequences.