id:A127989 - OEIS Search Results

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Numbers of the form 2n^3 - 2n + 9.

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9, 21, 57, 129, 249, 429, 681, 1017, 1449, 1989, 2649, 3441, 4377, 5469, 6729, 8169, 9801, 11637, 13689, 15969, 18489, 21261, 24297, 27609, 31209, 35109, 39321, 43857, 48729, 53949, 59529, 65481, 71817, 78549, 85689, 93249, 101241, 109677, 118569 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`All numbers generated by the irreducible polynomial 2n^3 - 2n + 9 are odd and composite. Largest prime factor A127990, smallest prime factor A127991, number of prime factors A127992`
	FORMULA	`a(n) = 2n^3 - 2n + 9`
	MATHEMATICA	`Table[2x^3 - 2x + 9, {x, 1, 100}]`
	CROSSREFS	`Cf. A127990, A127991, A127992.` `Sequence in context: A144482 A134717 A147169 this_sequence A147337 A020290 A020288` `Adjacent sequences: A127986 A127987 A127988 this_sequence A127990 A127991 A127992`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Feb 10 2007`

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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.

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