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COMMENTS
| Equivalence classes of invertible maps from {0,1}^n to {0,1}^n, under action of (C_2)^n on domain and F_n=[S_2]^(S_n) on range. [Sean A. Irvine, 16 Mar 2011]
Technical report version of Harrison's paper contains incorrect value for a(4) [Sean A. Irvine, 16 Mar 2011]
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REFERENCES
| M. A. Harrison, The number of classes of invertible Boolean functions, J. ACM 10 (1963), 25-28.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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