id:A088469 - OEIS Search Results

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Number of dismal prime divisors of n

+0
1

0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; listen)

	OFFSET	`1,11`
	LINKS	`D. Applegate, C program for dismal arithmetic and number theory` `Index entries for sequences related to dismal arithmetic`
	EXAMPLE	`10 = 9*90 and 90 is prime. 90 is the only prime divisor of 10, so a(10) = 1.`
	CROSSREFS	`Sequence in context: A058418 A059933 A002488 this_sequence A089170 A040292 A040293` `Adjacent sequences: A088466 A088467 A088468 this_sequence A088470 A088471 A088472`
	KEYWORD	`nonn`
	AUTHOR	`David Applegate (david(AT)research.att.com), Nov 11 2003`

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

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