P. Diaconis, R. L. Graham and B. Sturmfels, Primitive partition identities, in Combinatorics: Paul ErdÅ‘s is Eighty, Vol. 2, Bolyai Soc. Math. Stud., 2, 1996, pp. 173-192.

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