A077032 - OEIS

A077032

Numbers k such that A068340(k)=+/-4.

3, 4, 137, 5023, 5024, 5025, 5030, 5031, 5032

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Any subsequent terms are > 10^12. - Lucas A. Brown, Mar 18 2024

LINKS

Lucas A. Brown, Python program.

PROG

(PARI) isok(k) = abs(sum(i=1, k, i*moebius(i))) == 4; \\ Michel Marcus, Jan 14 2023

CROSSREFS

KEYWORD

nonn,more,hard

AUTHOR

Zak Seidov, Oct 21 2002

STATUS

approved