A349615 a(n) = A349613(n) + A349614(n).

2, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, -6, 0, 0, 14, 9, 0, -14, 0, -42, 4, 0, 0, 54, 49, 0, -17, -12, 0, -118, 0, -36, 10, 0, 28, 124, 0, 0, 28, 144, 0, -24, 0, -30, -215, 0, 0, -167, 4, -140, 34, -84, 0, 187, 70, 12, 30, 0, 0, 626, 0, 0, -114, 69, 196, -106, 0, -102, 26, -12, 0, -508, 0, 0, -785, -90, 20, -254, 0, -287, 125

Offset: 1

Author

Antti Karttunen, Nov 23 2021

Keywords

• sign

Links

• Antti Karttunen, Table of n, a(n) for n = 1..20000
• Index entries for sequences related to EKG sequence

Crossrefs

Cf. A349613, A349614.

Programs

PARI

A349615(n) = (A349613(n)+A349614(n)); \\ Needs also code from A349613 and A349614.

Formula

a(1) = 2, and for n > 1, a(n) = -Sum_{d|n, 1A349613(d) * A349614(n/d). [As the sequences are Dirichlet inverses of each other]