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Search: id:A130620
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OFFSET
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0,1
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REFERENCES
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P. Curtz Gazette des Mathematiciens,1992,52,p.44 . P. Flajolet,X. Gourdon,B.Salvy id.1993,55,pp.67-78 .
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FORMULA
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We apply the transform P(0,x)=u(0) P(n,x)= u(n) +x* sum(u(i)*P(n-i+1),x) i=0.. n-1 (see references) . 3 1 9 4 6 27 1 25 27 81 5 14 117 108 243 Row sums,differences,halfsums: 3 8 25 78 243 3, 3 10 37 134 487, 3 9 31 106 365 .
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CROSSREFS
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Sequence in context: A027094 A027033 A027096 this_sequence A127927 A123222 A112566
Adjacent sequences: A130617 A130618 A130619 this_sequence A130621 A130622 A130623
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KEYWORD
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nonn,uned
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Jun 18 2007
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