A083260 a(n) = gcd(A046523(n), A071364(n)).

1, 2, 2, 4, 2, 6, 2, 8, 4, 6, 2, 12, 2, 6, 6, 16, 2, 6, 2, 12, 6, 6, 2, 24, 4, 6, 8, 12, 2, 30, 2, 32, 6, 6, 6, 36, 2, 6, 6, 24, 2, 30, 2, 12, 12, 6, 2, 48, 4, 6, 6, 12, 2, 6, 6, 24, 6, 6, 2, 60, 2, 6, 12, 64, 6, 30, 2, 12, 6, 30, 2, 72, 2, 6, 6, 12, 6, 30, 2, 48, 16, 6, 2, 60, 6, 6, 6, 24, 2, 30, 6

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..10000

Prog

(PARI)
A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f, (p=nextprime(p+1))^f[i]); };  \\ This function from Charles R Greathouse IV, Aug 17 2011
A071364(n) = { my(f = factor(n)); for (i=1, #f~, f[i, 1] = prime(i)); factorback(f); }; \\ This function from Michel Marcus, Jun 13 2014
A083260(n) = gcd(A046523(n), A071364(n)); \\ Antti Karttunen, Aug 24 2017

Crossrefs

Cf. A046523, A071364, A083255, A083256, A083257, A083258, A083259, A083261.

Sequence in context: A275365 A119655 A364949 * A284011 A275468 A046523

Adjacent sequences: A083257 A083258 A083259 * A083261 A083262 A083263

Keyword

nonn

Author

Labos Elemer, May 09 2003

Status

approved