3,1

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

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

F. N. David, M. G. Kendall and D. E. Barton, Symmetric Function and Allied Tables, Cambridge, 1966, p. 262.

Sequence in context: A116398 A001542 A059229 this_sequence A143357 A012426 A012421

Adjacent sequences: A001248 A001249 A001250 this_sequence A001252 A001253 A001254

nonn

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