A391937 Numbers k such that A276086(k) = A391936(k).

0, 3, 5, 6, 39, 41, 45, 69, 210, 2316, 30030, 510555, 510720, 9699690, 223092870

Offset

1,2

Comments

When A276086 is applied to these terms and the resulting sequence is sorted into ascending order, we obtain the intersection of A048103 and A343405.

Links

Table of n, a(n) for n=1..15.

Index entries for sequences related to primorial base.

Prog

(PARI)
A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
is_A391937(n) = { my(x=A276086(n), m=1, s=0); for(i=1, oo, if(s>x, return(0)); if(m>x, return(s==x)); s += (x%prime(i))*m; m *= prime(i)); };

Crossrefs

Cf. A002110, A048103, A276086, A343405, A391936.

Sequence in context: A086189 A137082 A242501 * A099414 A004785 A099744

Adjacent sequences: A391934 A391935 A391936 * A391938 A391939 A391940

Keyword

nonn,base,more

Author

Antti Karttunen, Jan 06 2026

Status

approved