A005787 Reachable configurations on n circles. (Formerly M1904)

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

Table of n, a(n) for n=1..5.

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

Adjacent sequences: A005784 A005785 A005786 * A005788 A005789 A005790

Keyword

nonn,nice,hard,more

Author

N. J. A. Sloane, Jeffrey Shallit

Extensions

a(5) from Sean A. Irvine, Apr 30 2020

Status

approved