OFFSET
0,9
LINKS
Amy Glen, Jacques Justin, Steve Widmer and Luca Q. Zamboni, Palindromic richness, arXiv:0801.1656 [math.CO]
FORMULA
2^n - A216264(n).
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, May 16 2013
STATUS
approved