OFFSET
0,3
REFERENCES
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Timothy R. Walsh, Generating nonisomorphic maps without storing them, SIAM J. Algebraic Discrete Methods 4 (1983), no. 2, 161-178.
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(8)-a(12) from Sean A. Irvine, Mar 29 2017
a(0)=1 prepended by Andrew Howroyd, Jan 14 2025
STATUS
approved
