1,1

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

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 835.

J. Riordan, An Introduction to Combinatorial Analysis, Wiley, 1958, p. 48.

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].

N. J. A. Sloane, An on-line version of the Encyclopedia of Integer Sequences, Electronic J. Combinatorics, Vol. 1, no. 1, 1994.

Sequence in context: A158682 A100359 A052342 this_sequence A164829 A028337 A135014

Adjacent sequences: A007187 A007188 A007189 this_sequence A007191 A007192 A007193

nonn

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