3,1

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

S. Pilpel, Descending subsequences of random permutations, J. Combin. Theory, A 53 (1990), 96-116.

Sequence in context: A148800 A033483 A130522 this_sequence A009268 A024430 A012408

Adjacent sequences: A006216 A006217 A006218 this_sequence A006220 A006221 A006222

nonn,more

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