id:A165683 - OEIS Search Results

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Primes of form 3*p*(p-1)+1 with p also a prime.

+0
3

7, 19, 61, 127, 331, 2437, 2791, 5419, 8269, 10267, 13267, 23497, 35317, 55897, 73477, 89269, 115837, 170647, 292969, 360187, 372769, 452797, 603457, 812761, 895987, 929077, 976411, 997057, 1074607, 1125469, 1253887, 1372957, 1609669, 1653919 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = x^3-(x-1)^3 where x = A165682(n).`
	EXAMPLE	`a(3)= 61=35(5-1)+1 generated by p=3. a(4)=127=37(7-1)+1 generated by p=7. a(5)=331=311(11-1)+1.`
	CROSSREFS	`Cf. A165681, A165682` `Sequence in context: A000413 A155335 A155226 this_sequence A092359 A155338 A155401` `Adjacent sequences: A165680 A165681 A165682 this_sequence A165684 A165685 A165686`
	KEYWORD	`nonn`
	AUTHOR	`Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Sep 24 2009`
	EXTENSIONS	`7 and 19 inserted by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 26 2009`

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

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