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L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 303, #42.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
Table of n, a(n) for n=1..9.
Sequence in context: A055612 A236691 A056642 * A232469 A034997 A067735
Adjacent sequences: A001196 A001197 A001198 * A001200 A001201 A001202