A077030 Numbers k such that A068340(k)=+/-2.
122, 127, 128, 142, 5233
Offset: 1
Links
- Lucas A. Brown, Python program.
Programs
-
PARI
isok(k) = abs(sum(i=1, k, i*moebius(i))) == 2; \\ Michel Marcus, Jan 14 2023
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
isok(k) = abs(sum(i=1, k, i*moebius(i))) == 2; \\ Michel Marcus, Jan 14 2023
isok(k) = abs(sum(i=1, k, i*moebius(i))) == 3; \\ Michel Marcus, Jan 14 2023
isok(k) = abs(sum(i=1, k, i*moebius(i))) == 4; \\ Michel Marcus, Jan 14 2023
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