A328582 - OEIS

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A328582

Least common multiple of nonzero digits in primorial base expansion of n.

5

1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 6, 6, 3, 3, 3, 3, 6, 6, 6, 6, 6, 6

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OFFSET

0,5

COMMENTS

a(0) = 1 as an empty product.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..32768

Index entries for sequences related to lcm's

Index entries for sequences related to primorial base

FORMULA

a(n) = A072411(A276086(n)).

PROG

(PARI) A328582(n) = { my(m=1, p=2); while(n, if(n%p, m = lcm(m, n%p)); n = n\p; p = nextprime(1+p)); (m); };

CROSSREFS

Cf. A072411, A276086, A328581.

Cf. A276156 (positions of 1's).

Sequence in context: A246359 A328114 A343504 * A227153 A328581 A238643

Adjacent sequences: A328579 A328580 A328581 * A328583 A328584 A328585

KEYWORD

nonn

AUTHOR

Antti Karttunen, Oct 21 2019

STATUS

approved