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A358232
Numbers k for which A276086(k) == 1 mod A003415(k), where A276086 is the primorial base exp-function, and A003415 is the arithmetic derivative.
2
4, 16, 54, 66, 864, 1710, 18900, 71254, 120731, 492943, 625081, 700149, 1489459, 3564419, 44995876, 219794251, 297776323, 596506003, 642171139, 972082711, 1065608507, 1252704562, 1385872853, 1416187590, 1799971549, 1818740449
OFFSET
1,1
PROG
(PARI)
A003415(n) = if(n<=1, 0, my(f=factor(n)); n*sum(i=1, #f~, f[i, 2]/f[i, 1]));
A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
isA358232(n) = (1==(A276086(n)%A003415(n)));
CROSSREFS
Subsequence of A358228. Positions of 1's in A328382.
Cf. also A358231.
Sequence in context: A192074 A293884 A121159 * A239032 A254823 A134968
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 25 2022
STATUS
approved