0,2

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

C. F. Earl and L. J. March, Architectural applications of graph theory, pp. 327-355 of R. J. Wilson and L. W. Beineke, editors, Applications of Graph Theory. Academic Press, NY, 1979.

Sequence in context: A007025 A014512 A065606 this_sequence A049372 A050549 A167144

Adjacent sequences: A005498 A005499 A005500 this_sequence A005502 A005503 A005504

nonn

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