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A097333 Sum k=0..n, C(n-k, floor(k/2)). +0
7
1, 2, 2, 3, 5, 7, 10, 15, 22, 32, 47, 69, 101, 148, 217, 318, 466, 683, 1001, 1467, 2150, 3151, 4618, 6768, 9919, 14537, 21305, 31224, 45761, 67066, 98290, 144051, 211117, 309407, 453458, 664575, 973982, 1427440, 2092015, 3065997, 4493437, 6585452 (list; graph; listen)
OFFSET

0,2

COMMENT

Partial sums of A058278.

FORMULA

G.f. : (1+x-x^2-x^3)/((1-x)(1-x^2-x^3-x^4))=(1+x)/(1-x-x^3); a(n)=a(n-1)+a(n-3); a(n)=a(n-1)+a(n-2)-a(n-5).

CROSSREFS

Cf. A003410.

Sequence in context: A061565 A077075 A058278 this_sequence A001083 A120412 A022864

Adjacent sequences: A097330 A097331 A097332 this_sequence A097334 A097335 A097336

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Aug 05 2004

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.


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