1,1

D. Rubinstein, Jeffrey Shallit and M. Szegedy, A subset coloring algorithm and its application to computer graphics, Commun. ACM, 31 (1988), 1228-1232.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Table of n, a(n) for n=1..4.

Sequence in context: A012554 A012665 A211938 * A012343 A012347 A099292

Adjacent sequences:  A005784 A005785 A005786 * A005788 A005789 A005790

nonn,nice,hard

N. J. A. Sloane, Jeffrey Shallit

approved