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%I #13 Mar 19 2024 03:17:48
%S 1,2,86,89,90,133,5235,5236
%N Numbers n such that A068340(n)=+/-1.
%C 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).
%C Any subsequent terms are > 10^12. - _Lucas A. Brown_, Mar 18 2024
%H Lucas A. Brown, <a href="https://github.com/lucasaugustus/oeis/blob/main/A076542.py">Python program</a>.
%Y Cf. A068340.
%K hard,nonn,more
%O 1,2
%A _Zak Seidov_, Oct 19 2002
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