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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
P. G. Watson, in C. Domb and M. S. Green, Phase Transitions and Critical Phenomena, Ac. Press 1972, Vol. 2, p. 136.
Table of n, a(n) for n=1..11.
Sequence in context: A244887 A279112 A229454 * A081006 A003481 A000183
Adjacent sequences: A003487 A003488 A003489 * A003491 A003492 A003493
N. J. A. Sloane.
Better description from Steven Finch