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Search: id:A006859
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| A006859 |
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From paths in the plane.
(Formerly M5210)
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+0
1
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| 1, 30, 330, 2145, 10010, 37128, 116280, 319770, 793155, 1808950, 3848130, 7719075, 14725620, 26898080, 47303520, 80454132, 132835365, 213578430, 335304970, 515175045, 776173134
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
G. Kreweras and H. Niederhausen, Solution of an enumerative problem connected with lattice paths, European J. Combin., 2 (1981), 55-60.
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FORMULA
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G.f.: (1+x)(1 +19 x +56 x^2 +19 x^3 + x^4 ) / (1-x)^10.
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CROSSREFS
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Sequence in context: A134287 A141216 A159543 this_sequence A107967 A115500 A125418
Adjacent sequences: A006856 A006857 A006858 this_sequence A006860 A006861 A006862
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KEYWORD
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nonn,easy
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AUTHOR
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Simon Plouffe (simon.plouffe(AT)gmail.com)
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