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A181813
a(n)=smallest integer that, upon multiplying any integer from 1 to n, produces a member of A025487.
5
1, 1, 2, 2, 12, 12, 360, 360, 720, 720, 151200, 151200, 349272000, 349272000, 349272000, 349272000, 10488638160000, 10488638160000, 5354554667061600000, 5354554667061600000, 5354554667061600000, 5354554667061600000
OFFSET
1,3
FORMULA
If A003418(n) = Product p(i)^e(i), then a(n) = Product A002110(i-1)^e(i). I.e., a(n) = A181811(A003418(n)).
a(n) = A181814(n)/A003418(n).
EXAMPLE
For integers k = 1 to 6, 12k (12, 24, 36, 48, 60, 72) is always a member of A025487. 12 is the smallest integer with this property; therefore, a(6) = 12.
CROSSREFS
All terms belong to A181818.
Sequence in context: A092144 A224497 A305753 * A059187 A350329 A265458
KEYWORD
nonn
AUTHOR
Matthew Vandermast, Nov 30 2010
STATUS
approved