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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
S. G. Whittington, G. M. Torrie and A. J. Guttmann, The Ising model with a free surface: a series analysis study, J. Phys. A 12 (1979), 2449-2455.
Table of n, a(n) for n=0..12.
Sequence in context: A125784 A218964 A154964 * A116904 A126952 A273570
Adjacent sequences: A007284 A007285 A007286 * A007288 A007289 A007290