%I A001251 M2031 N0803
%S A001251 2,12,70,442,3108,24216,208586,1972904,20373338,228346522,
%T A001251 2763259364,35927135944
%N A001251 Number of permutations of length n by length of runs.
%D A001251 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001251 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001251 F. N. David, M. G. Kendall and D. E. Barton, Symmetric Function and Allied 
               Tables, Cambridge, 1966, p. 262.
%Y A001251 Sequence in context: A116398 A001542 A059229 this_sequence A143357 A012426 
               A012421
%Y A001251 Adjacent sequences: A001248 A001249 A001250 this_sequence A001252 A001253 
               A001254
%K A001251 nonn
%O A001251 3,1
%A A001251 N. J. A. Sloane (njas(AT)research.att.com).