OFFSET
1,2
COMMENTS
Comment from Jonathan Vos Post, May 18 2010 (Start):
The subsequence of primes begins: 3, 29, 103, 109, 151, 251, 331, 613, 643, 1033, 1151, 1277, 1307, 1399.
The subsequence of perfect powers begins: 1, 25, 128, 400, 1296. (End)
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 1..10000
Li Hailong and Zhao Xiaopeng, On the Smarandache function and the k-th roots of a positive integer, 2004, p. 119.
FORMULA
a(n) ~ Pi^2 * n^2 / (12 * log(n)) [Li Hailong and Zhao Xiaopeng, 2004]. - Vaclav Kotesovec, Jul 29 2021
MATHEMATICA
Accumulate[Table[found = 0; m = 1; While[found == 0, If[IntegerQ[m!/n], found = 1, m++]]; m, {n, 1, 100}]] (* Vaclav Kotesovec, Jul 29 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Vaclav Kotesovec, Jul 29 2021
STATUS
approved