id:A072487 - OEIS Search Results

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a(1) = 1, a(n) = a(n-1) times largest nontrivial divisor if n is composite.

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1, 2, 6, 12, 60, 180, 1260, 5040, 15120, 75600, 831600, 4989600, 64864800, 454053600, 2270268000, 18162144000, 308756448000, 2778808032000, 52797352608000, 527973526080000, 3695814682560000, 40653961508160000 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) = n*a(n-1) if n is a prime.`
	EXAMPLE	`a(6)= 180 hence a(7) = 7*180 = 1260.`
	CROSSREFS	`Cf. A072486.` `Sequence in context: A104371 A104350 A072489 this_sequence A072938 A160274 A048803` `Adjacent sequences: A072484 A072485 A072486 this_sequence A072488 A072489 A072490`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 13 2002`
	EXTENSIONS	`More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 25 2003`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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