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1,2
Table of n, a(n) for n=1..10.
Jonathan Bloom and Sergi Elizalde, Pattern avoidance in matchings and partitions, arXiv preprint arXiv:1211.3442, 2012. See Table 1.
Sequence in context: A256330 A190761 A005700 * A088717 A111538 A230218
Adjacent sequences: A220908 A220909 A220910 * A220912 A220913 A220914
nonn
N. J. A. Sloane, Jan 03 2013
approved