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A328579
a(n) = A053669(A276086(A276086(n))).
6
3, 2, 5, 2, 7, 2, 5, 2, 7, 2, 11, 2, 3, 2, 11, 2, 7, 2, 5, 2, 13, 2, 13, 2, 3, 2, 13, 2, 17, 2, 3, 2, 7, 2, 5, 2, 5, 2, 11, 2, 13, 2, 3, 2, 13, 2, 13, 2, 5, 2, 17, 2, 17, 2, 3, 2, 17, 2, 11, 2, 3, 2, 11, 2, 7, 2, 5, 2, 13, 2, 13, 2, 3, 2, 17, 2, 17, 2, 5, 2, 17, 2, 19, 2, 3, 2, 13, 2, 19, 2, 3, 2, 13, 2, 17, 2, 5, 2, 17, 2, 17, 2, 3, 2, 17, 2
OFFSET
0,1
FORMULA
a(n) = A053669(A276087(n)).
a(n) = A326810(A276086(n)).
a(n) = A000040(A328578(n)).
For all even n, a(n) > A328569(n).
PROG
(PARI)
A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
A326810(n) = { my(i=1, p=2); while(n && (n%p), n = n\p; p = nextprime(1+p)); (p); };
(PARI)
A053669(n) = forprime(p=2, , if(n%p, return(p))); \\ From A053669
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 20 2019
STATUS
approved