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A115291 Expansion of (1+x)^3/(1-x). +0
6
1, 4, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8 (list; graph; listen)
OFFSET

0,2

COMMENT

Partial sums are A086570. Partial sums of squares are A115295. Correlation triangle is A115292.

FORMULA

a(n)=8-C(2, n)-2*C(1, n)-4*C(0, n); a(n)=sum{k=0..n, C(3, k)}; a(n)=A004070(n, 3).

CROSSREFS

Sequence in context: A021213 A115021 A121488 this_sequence A108615 A090383 A082390

Adjacent sequences: A115288 A115289 A115290 this_sequence A115292 A115293 A115294

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Jan 19 2006

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.


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