A380532 Second coefficient of the lindep transform of A129283 (n + arithmetic derivative of n).

-1, -1, -1, -2, -1, -2, -1, -2, -2, -2, -1, -2, -1, -3, -3, -3, -1, -2, -1, -2, -3, -3, -1, -3, -3, -3, -2, -2, -1, -2, -1, -7, -3, -3, -4, -8, -1, -3, -3, -8, -1, -2, -1, -2, -2, -3, -1, -10, -4, -2, -7, -2, -1, -5, -4, -8, -7, -3, -1, -5, -1, -3, -9, -4, -5, -2, -1, -2, -4, -2, -1, -3, -1, -3, -7, -2, -5, -2, -1, -3, -7, -3, -1, -5, -5

Offset

1,4

Comments

See A339791 for a definition of lindep-transform.

Links

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

Prog

(PARI)
A129283(n) = (n+if(n<=1, 0, my(f=factor(n)); n*sum(i=1, #f~, f[i, 2]/f[i, 1])));
A380532(n) = { my(v=lindep([A129283(n), n, 1])); (v*sign(v[1]))[2]; };

Crossrefs

Cf. A129283, A380531, A380533.

Cf. also A339791.

Sequence in context: A322867 A163109 A359289 * A286574 A329320 A316112

Adjacent sequences: A380528 A380529 A380531 * A380533 A380540 A380541

Keyword

sign

Author

Antti Karttunen, Jan 26 2025

Status

approved