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A002798 a(n)=a(n-2)+a(n-3)-a(n-5).
(Formerly M5055 N2186)
+0
2
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; listen)
OFFSET

1,1

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).

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.

MAPLE

A002798:=3*(6+9*z+2*z**2)/(z+1)/(z-1)**2; [S. Plouffe in his 1992 dissertation.]

CROSSREFS

Equals 6*A007310(n) + 3*A047208(n).

Sequence in context: A114814 A095739 A055577 this_sequence A124388 A075284 A057444

Adjacent sequences: A002795 A002796 A002797 this_sequence A002799 A002800 A002801

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Simon Plouffe (simon.plouffe(AT)gmail.com)

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Last modified December 10 12:09 EST 2009. Contains 170569 sequences.


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