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A005787
Reachable configurations on n circles.
(Formerly M1904)
2
2, 8, 112, 5856, 869824
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
Sequence in context: A317076 A211938 A331405 * A012343 A012347 A263249
KEYWORD
nonn,nice,hard,more
EXTENSIONS
a(5) from Sean A. Irvine, Apr 30 2020
STATUS
approved