OFFSET
1,1
COMMENTS
Total number of classes under permutation of n input variables and 3 output variables. [Sean A. Irvine, Jul 06 2011]
REFERENCES
M. A. Harrison, On the number of classes of switching networks, J. Franklin Instit., 276 (1963), 313-327.
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).
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Sean A. Irvine, Jul 05 2011
STATUS
approved