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A002798
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a(n)=a(n-2)+a(n-3)-a(n-5).
(Formerly M5055 N2186)
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2
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18, 45, 69, 96, 120, 147, 171, 198, 222, 249, 273, 300, 324, 351, 375, 402, 426, 453, 477, 504, 528, 555, 579, 606, 630, 657, 681, 708, 732, 759, 783, 810, 834, 861, 885, 912, 936, 963, 987, 1014, 1038, 1065, 1089
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| Ehrhart, E.; Sur un probleme de geometrie diophantienne lineaire II. Systemes diophantiens lineaires, J. Reine Angew. Math. 227 1967 25-49.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| S. Plouffe, Approximations de S\'{e}ries G\'{e}n\'{e}ratrices et Quelques Conjectures, Dissertation, Universit\'{e} du Qu\'{e}bec \`{a} Montr\'{e}al, 1992.
S. Plouffe, 1031 Generating Functions and Conjectures, Universit\'{e} du Qu\'{e}bec \`{a} Montr\'{e}al, 1992.
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MAPLE
| A002798:=3*(6+9*z+2*z**2)/(z+1)/(z-1)**2; [S. Plouffe in his 1992 dissertation.]
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CROSSREFS
| Equals 6*A007310(n) + 3*A047208(n).
Sequence in context: A177724 A095739 A055577 * A124388 A179896 A075284
Adjacent sequences: A002795 A002796 A002797 * A002799 A002800 A002801
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Simon Plouffe (simon.plouffe(AT)gmail.com)
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