A393071 Numbers k such that A276086(k) is a multiple of A003415(k) and A276087(k) is a multiple of A327859(k).

2, 6, 26, 94, 146, 185, 206, 221, 305, 1046, 1466, 2006, 2077, 2285, 2306, 2705, 2874, 2977, 4237, 4681, 4798, 5909, 6002, 6289, 6541, 6905, 8557, 9146, 9517, 11041, 12209, 12877, 13369, 13961, 14269, 14317, 14921, 15185, 16409, 16897, 18157, 18409, 18569, 19189, 21446, 21869, 22289, 23377, 23674, 25385, 25406

Offset

1,1

Links

Antti Karttunen, Table of n, a(n) for n = 1..10000

Index entries for sequences related to primorial base.

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); };
is_A393071(n) = if(n<2 || (isprime(n) && (n%2)), 0, my(ad=A003415(n), ep=A276086(n)); (!(ep%ad) && !(A276086(ep)%A276086(ad))));

Crossrefs

Cf. A003415, A276086, A276087, A327859.

Intersection of A358221 and A383303. Subsequence of A358215, thus also of A048103.

Sequence in context: A240296 A027207 A027231 * A083845 A383933 A027239

Adjacent sequences: A393068 A393069 A393070 * A393072 A393074 A393075

Keyword

nonn,base

Author

Antti Karttunen, Feb 10 2026

Status

approved