OFFSET
1,1
COMMENTS
The prime p that minimizes p^(1+nu_p(n)), where nu_p(n) is the p-adic order of n.
It satisfies p^(1+nu_p(n)) = A007978(n).
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
MAPLE
Primes:= select(isprime, [2, seq(2*i+1, i=1..100)]):
seq(Primes[min[index](map(p -> p^(1+padic[ordp](n, p)), Primes))], n=1..200);
MATHEMATICA
Table[(LCM[n, Min[Complement[Range[n+1], Divisors[n]]]]/n), {n, 100}] (* Vincenzo Librandi, May 21 2015 *)
PROG
(Haskell)
a258115 n = a208570 n `div` n -- Reinhard Zumkeller, May 22 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert Israel, May 20 2015
STATUS
approved