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. 833.

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: A053608 A123261 A124061 this_sequence A114628 A135424 A132495

Adjacent sequences: A007186 A007187 A007188 this_sequence A007190 A007191 A007192

nonn

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