id:A156190 - OEIS Search Results

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Number of divisors d of n! such that d-1 is prime.

+0
2

0, 0, 2, 6, 9, 18, 29, 43, 66, 101, 187, 257, 470, 717, 1033, 1293, 2442, 3168, 6011, 7911, 11179, 16888, 32603, 39587, 53063, 79742, 97707, 127679, 246428, 302205, 585129, 670409, 923535, 1385145, 1813935, 2099557, 4091926, 6142573, 8416157 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`Ray Chandler, Table of n, a(n) for n=1..42`
	FORMULA	`a(n) = A072627(A000142(n)).`
	CROSSREFS	`Cf. A072627, A067847.` `Sequence in context: A156222 A002886 A028724 this_sequence A076738 A082290 A093840` `Adjacent sequences: A156187 A156188 A156189 this_sequence A156191 A156192 A156193`
	KEYWORD	`nonn`
	AUTHOR	`Ray Chandler (rayjchandler(AT)sbcglobal.net), Feb 05 2009`

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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