OFFSET
1,12
COMMENTS
Conjecture: a(n) >= 0. Verified for n <= 100000.
I believe I have a proof of the conjecture, although I have not yet written out all the details.
LINKS
N. J. A. Sloane, Table of n, a(n) for n = 1..10000
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 08 2021
STATUS
approved