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 A052835 E.g.f.: 1/(1+log(1-x))-log(1-x). 0
 1, 2, 4, 16, 94, 718, 6698, 73512, 925944, 13149408, 207723792, 3611861856, 68535403440, 1409110979664, 31203828680880, 740391021216384, 18739539315968256, 503958517859488896, 14350254992824182912, 431329037106221865216, 13646963521734433991424 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Previous name was: A simple grammar. LINKS Table of n, a(n) for n=0..20. INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 802 FORMULA E.g.f.: (-log(-1/(-1+x))+log(-1/(-1+x))^2-1)/(-1+log(-1/(-1+x))). a(n) ~ n! * exp(n)/(exp(1)-1)^(n+1). - Vaclav Kotesovec, Sep 30 2013 MAPLE spec := [S, {C=Sequence(B), B=Cycle(Z), S=Union(B, C)}, labeled]: seq(combstruct[count](spec, size=n), n=0..20); MATHEMATICA CoefficientList[Series[1/(1+Log[1-x])-Log[1-x], {x, 0, 20}], x]* Range[0, 20]! (* Vaclav Kotesovec, Sep 30 2013 *) CROSSREFS Sequence in context: A058136 A156335 A026089 * A009565 A009838 A088335 Adjacent sequences: A052832 A052833 A052834 * A052836 A052837 A052838 KEYWORD easy,nonn AUTHOR encyclopedia(AT)pommard.inria.fr, Jan 25 2000 EXTENSIONS New name, using e.g.f., by Vaclav Kotesovec, Sep 30 2013 More terms from Alois P. Heinz, Mar 16 2016 STATUS approved

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Last modified August 8 23:29 EDT 2024. Contains 375024 sequences. (Running on oeis4.)