A380461 First coefficient of the lindep transform of the sum of squarefree divisors of n, A048250.

1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 2, 1, 1, 3, 1, 1, 2, 3, 1, 2, 4, 2, 1, 1, 1, 2, 1, 1, 2, 2, 3, 3, 1, 2, 2, 2, 1, 3, 1, 5, 2, 2, 1, 4, 6, 3, 5, 5, 1, 4, 3, 7, 5, 2, 1, 5, 1, 2, 2, 1, 3, 1, 1, 5, 5, 1, 1, 6, 1, 2, 3, 5, 4, 1, 1, 4, 1, 2, 1, 7, 4, 2, 5, 5, 1, 5, 4, 5, 3, 2, 4, 8, 1, 4, 2, 6, 1, 1, 1, 5, 6

Offset

1,8

Comments

See A339791 for a definition of lindep-transform.

Links

Antti Karttunen, Table of n, a(n) for n = 1..20000

Prog

(PARI)
A048250(n) = factorback(apply(p -> p+1, factor(n)[, 1]));
A380461(n) = { my(v=lindep([A048250(n), n, 1])); (v*sign(v[1]))[1]; };

Crossrefs

Cf. A048250, A380462, A380463.

Cf. also A339790, A380471, A380481.

Sequence in context: A286132 A105551 A305195 * A073772 A164562 A058188

Adjacent sequences: A380456 A380457 A380458 * A380462 A380463 A380464

Keyword

nonn,new

Author

Antti Karttunen, Jan 26 2025

Status

approved