4,1

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: A002576 A037727 A037622 this_sequence A067058 A002302 A056662

Adjacent sequences: A001249 A001250 A001251 this_sequence A001253 A001254 A001255

nonn

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