1,1

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

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

Sequence in context: A132523 A012554 A012665 this_sequence A012343 A012347 A099292

Adjacent sequences: A005784 A005785 A005786 this_sequence A005788 A005789 A005790

nonn,nice,hard

N. J. A. Sloane (njas(AT)research.att.com), Jeffrey Shallit