A358231 Numbers k for which A276086(k) == 1 (mod k), where A276086 is the primorial base exp-function.

2, 4, 12, 16, 24, 47, 54, 72, 120, 142, 144, 432, 540, 864, 972, 1049, 1260, 1916, 2628, 10152, 12798, 19024, 20304, 100565, 152668, 209760, 445362, 2071560, 2759034, 3344269, 85167240, 92667148, 111135679, 118344316, 162716506, 264678868, 599478496

Offset: 1

Author

Antti Karttunen, Nov 24 2022

Keywords

• nonn

Links

• Index entries for sequences related to primorial base

Crossrefs

Positions of 1's in A328386.

Cf. A276086, A328387.

Programs

PARI

A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
isA358231(n) = (1==(A276086(n)%n));