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A337341 a(n) = A337339(n) - n. 3
0, 3, 10, 37, 20, 107, 54, 357, 304, 211, 74, 1001, 132, 95, 598, 3265, 164, 2795, 246, 1965, 1492, 739, 398, 9089, 1176, 1275, 7786, 349, 452, 5483, 654, 29493, 2080, 1591, 2930, 25277, 804, 2343, 3574, 17821, 884, 13571, 1062, 6801, 15268, 3739, 1358, 81965, 7272, 10755, 4462, 11653, 1688, 70259, 4086, 8765, 6556, 807 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Superficially, it seems that A000027 offers an lower bound for A337339 as there seems to be no negative terms in this sequence, but of course it is not guaranteed.
LINKS
FORMULA
a(n) = A337339(n) - n.
PROG
(PARI)
A003961(n) = { my(f = factor(n)); for(i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); factorback(f); };
A337341(n) = { my(h=A003961(n), s=(h^2), u=(s+1)/2); ((u/gcd(1+sigma(s), u)) - n); };
CROSSREFS
Sequence in context: A010373 A322726 A104603 * A080625 A289615 A359721
KEYWORD
nonn
AUTHOR
Antti Karttunen, Aug 24 2020
STATUS
approved

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)