A076542 Numbers n such that A068340(n) = +-1.

1, 2, 86, 89, 90, 133, 5235, 5236

Offset: 1

Author

Zak Seidov, Oct 19 2002

Keywords

• hard
• nonn
• more

Comments

Presumably A068340(n)=0 only for n=10; so I looked for n's such that A068340(n)=+/-s; here s=1 (and n<=800000). For s=6, there's no solution at all! For s=8, n=34 (only 1 solution); for s=7, n={55, 56} (2 solutions); for s=9, n={5, 51, 52} (3 solutions) (for n up to 800000).

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

Links

• Lucas A. Brown, Python program.

Crossrefs

Cf. A068340.