A057941 - OEIS

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A057941

Number of prime factors of 3^n + 1 (counted with multiplicity).

2, 2, 3, 2, 3, 3, 3, 3, 5, 4, 4, 3, 3, 4, 6, 2, 5, 4, 4, 3, 7, 4, 3, 6, 5, 4, 7, 4, 5, 6, 4, 2, 7, 4, 5, 4, 5, 4, 8, 5, 4, 7, 3, 5, 10, 4, 5, 4, 5, 8, 9, 4, 4, 5, 7, 6, 8, 4, 4, 7, 4, 5, 13, 2, 5, 6, 4, 5, 9, 9, 7, 8, 4, 5, 12, 6, 6, 7, 5, 5, 12, 5, 6, 10, 9, 7, 11, 6, 5, 9, 8, 4, 9, 4, 8, 6, 5, 9, 14, 6, 4 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	LINKS	`S. S. Wagstaff, Jr., Main Tables from the Cunningham Project.` `S. S. Wagstaff, Jr., The Cunningham Project`
	FORMULA	`a(n) = A057958(2n) - A057958(n) - T. D. Noe (noe(AT)sspectra.com), Jun 19 2003`
	CROSSREFS	`Cf. A007658, A057934-A057940, A054992.` `Cf. A057958.` `Sequence in context: A179844 A076223 A076235 * A126071 A185166 A105264` `Adjacent sequences: A057938 A057939 A057940 * A057942 A057943 A057944`
	KEYWORD	`nonn`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 2000.`

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Last modified February 14 20:38 EST 2012. Contains 205663 sequences.