3,3

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Walsh, T. R. S.; Generating nonisomorphic maps without storing them. SIAM J. Algebraic Discrete Methods 4 (1983), no. 2, 161-178.

Sequence in context: A135934 A137154 A098448 this_sequence A097656 A012936 A013091

Adjacent sequences: A006403 A006404 A006405 this_sequence A006407 A006408 A006409

nonn,more

N. J. A. Sloane (njas(AT)research.att.com).