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A072487 a(1) = 1, a(n) = a(n-1) times largest nontrivial divisor if n is composite. 0

%I

%S 1,2,6,12,60,180,1260,5040,15120,75600,831600,4989600,64864800,

%T 454053600,2270268000,18162144000,308756448000,2778808032000,

%U 52797352608000,527973526080000,3695814682560000,40653961508160000

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

%C a(n) = n*a(n-1) if n is a prime.

%e a(6)= 180 hence a(7) = 7*180 = 1260.

%Y Cf. A072486.

%K nonn

%O 1,2

%A _Amarnath Murthy_, Jul 13 2002

%E More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 25 2003

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Last modified October 23 08:40 EDT 2021. Contains 348211 sequences. (Running on oeis4.)