2,2

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: A057819 A129196 A119574 this_sequence A076966 A048757 A054433

Adjacent sequences: A006390 A006391 A006392 this_sequence A006394 A006395 A006396

nonn,more

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