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A077032
Numbers k such that A068340(k)=+/-4.
3
3, 4, 137, 5023, 5024, 5025, 5030, 5031, 5032
OFFSET
1,1
COMMENTS
Any subsequent terms are > 10^12. - Lucas A. Brown, Mar 18 2024
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