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A320108
a(n) = Product_{d|n, d>1} prime(1+(d mod 8)).
3
1, 5, 7, 55, 13, 595, 19, 110, 21, 325, 7, 71995, 13, 1615, 1729, 220, 3, 8925, 7, 39325, 1729, 595, 19, 287980, 39, 325, 147, 195415, 13, 12492025, 19, 440, 147, 75, 1729, 11879175, 13, 595, 1729, 157300, 3, 12492025, 7, 71995, 67431, 1615, 19, 1151920, 57, 4875, 147, 39325, 13, 1062075, 1729, 781660, 147, 325, 7, 182895738025, 13, 1615, 98553, 880, 507
OFFSET
1,2
LINKS
FORMULA
a(n) = Product_{d|n, d>1} prime(1+(d mod 8)).
PROG
(PARI) A320108(n) = { my(m=1); fordiv(n, d, if(d>1, m *= prime(1+(d%8)))); (m); };
CROSSREFS
Cf. A320109 (rgs-transform).
Sequence in context: A168545 A376613 A320116 * A320112 A284380 A082714
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 06 2018
STATUS
approved