id:A069353 - OEIS Search Results

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Numbers of form 2^i*3^j - 1 with i, j >= 0.

+0
3

0, 1, 2, 3, 5, 7, 8, 11, 15, 17, 23, 26, 31, 35, 47, 53, 63, 71, 80, 95, 107, 127, 143, 161, 191, 215, 242, 255, 287, 323, 383, 431, 485, 511, 575, 647, 728, 767, 863, 971, 1023, 1151, 1295, 1457, 1535, 1727, 1943, 2047, 2186 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Are there infinitely many primes in this sequence? See A005105.`
	REFERENCES	`G. Everest, P. Rogers and T. Ward, A higher-rank Mersenne problem, pp. 95-107 of ANTS 2002, Lect. Notes Computer Sci. 2369 (2002).`
	FORMULA	`a(n) = A003586(n)-1.`
	CROSSREFS	`Cf. A055600, A069355, A005105.` `Sequence in context: A066720 A060634 A026401 this_sequence A090704 A112055 A076386` `Adjacent sequences: A069350 A069351 A069352 this_sequence A069354 A069355 A069356`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Mar 18 2002`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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