OFFSET
1,2
LINKS
Abe, Ryuji, and BenoƮt Rittaud. On palindromes with three or four letters associated to the Markoff spectrum, Discrete Mathematics, 340.12 (2017): 3032-3043.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Oct 19 2017
STATUS
approved