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A373459 Expansion of Sum_{p prime} x^p/(1 - (p*x)^p). 1
0, 1, 1, 4, 1, 43, 1, 64, 729, 3381, 1, 20707, 1, 827639, 10297066, 16384, 1, 14414443, 1, 30517840269, 678610493338, 285312719187, 1, 10464547507, 95367431640625, 302875123369469, 282429536481, 558545864150392871, 1, 298030849742873568, 1, 1073741824 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
FORMULA
a(n) = Sum_{p|n prime} p^(n - p).
If p is prime, a(p) = 1.
PROG
(PARI) a(n) = sumdiv(n, d, isprime(d)*d^(n-d));
CROSSREFS
Sequence in context: A193962 A369868 A302441 * A269906 A092667 A060627
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Jun 06 2024
STATUS
approved

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Last modified July 16 08:10 EDT 2024. Contains 374345 sequences. (Running on oeis4.)