1,2
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..7.
L. Comtet, Birecouvrements et birevêtements d’un ensemble fini, Studia Sci. Math. Hungar 3 (1968): 137-152. [Annotated scanned copy. Warning: the table of v(n,k) has errors.]
Sequence in context: A230318 A006057 A305472 * A020554 A062874 A321239
Adjacent sequences: A002716 A002717 A002718 * A002720 A002721 A002722
dead
N. J. A. Sloane, Oct 20 2015
approved
