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 A072487 a(1) = 1, a(n) = a(n-1) times largest nontrivial divisor if n is composite. 0
 1, 2, 6, 12, 60, 180, 1260, 5040, 15120, 75600, 831600, 4989600, 64864800, 454053600, 2270268000, 18162144000, 308756448000, 2778808032000, 52797352608000, 527973526080000, 3695814682560000, 40653961508160000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) = n*a(n-1) if n is a prime. LINKS EXAMPLE a(6)= 180 hence a(7) = 7*180 = 1260. CROSSREFS Cf. A072486. Sequence in context: A104350 A220027 A072489 * A309875 A254232 A189394 Adjacent sequences:  A072484 A072485 A072486 * A072488 A072489 A072490 KEYWORD nonn AUTHOR Amarnath Murthy, Jul 13 2002 EXTENSIONS More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 25 2003 STATUS approved

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Last modified December 10 04:15 EST 2019. Contains 329885 sequences. (Running on oeis4.)