OFFSET
1,1
REFERENCES
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Sean A. Irvine, Java program (github)
D. Rubinstein, Jeffrey Shallit and M. Szegedy, A subset coloring algorithm and its application to computer graphics, Commun. ACM, 31 (1988), 1228-1232.
CROSSREFS
KEYWORD
nonn,nice,hard,more
AUTHOR
EXTENSIONS
a(5) from Sean A. Irvine, Apr 30 2020
STATUS
approved