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A167448 Smallest number with n distinct positive cubic exponents in its prime factorization. 5
1, 2, 768, 4403012567040, 384637545508886260255243527782400000000 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
a(n) = Product_{k=1..n} prime(k)^((n-k+1)^3).
EXAMPLE
a(2)=768, which has a prime factorization of 2^8 * 3^1.
MATHEMATICA
Table[Product[Prime[k]^((n - k + 1)^3), {k, 1, n}], {n, 0, 5}] (* Vaclav Kotesovec, Aug 10 2021 *)
CROSSREFS
Subsequence of A025487.
Sequence in context: A102969 A179960 A344663 * A320481 A078169 A226779
KEYWORD
nonn
AUTHOR
Matthew Vandermast, Nov 09 2009
STATUS
approved

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Last modified June 17 15:18 EDT 2024. Contains 373453 sequences. (Running on oeis4.)