A393059 a(n) = LCM_{d|n, d<n} A276086(d), where A276086 is the primorial base exp-function.

1, 2, 2, 6, 2, 6, 2, 18, 6, 18, 2, 90, 2, 30, 18, 90, 2, 30, 2, 90, 30, 90, 2, 450, 18, 150, 30, 450, 2, 450, 2, 450, 90, 450, 90, 2250, 2, 750, 150, 2250, 2, 750, 2, 2250, 450, 2250, 2, 11250, 10, 11250, 450, 11250, 2, 3750, 90, 11250, 750, 11250, 2, 15750, 2, 42, 750, 3150, 450, 15750, 2, 3150, 2250, 3150, 2

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..11550

Index entries for sequences related to lcm's.

Index entries for sequences related to primorial base.

Formula

a(n) = A276086(A393063(n)).

Prog

(PARI)
A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
A393059(n) = { my(m=1); fordiv(n, d, if(d<n, m = lcm(m, A276086(d)))); (m); };

Crossrefs

Cf. A276086, A393060 (rgs-transform), A393063.

Cf. also A393061.

Sequence in context: A278162 A187223 A349921 * A175194 A086568 A351091

Adjacent sequences: A393056 A393057 A393058 * A393060 A393061 A393062

Keyword

nonn,base,easy

Author

Antti Karttunen, Feb 04 2026

Status

approved