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Search: id:A166753
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A166753 Partial sums of A166752. +0
3
1, 2, 5, 6, 17, 18, 61, 62, 233, 234, 917, 918, 3649, 3650, 14573, 14574, 58265, 58266, 233029, 233030, 932081, 932082, 3728285, 3728286, 14913097, 14913098, 59652341, 59652342, 238609313, 238609314, 954437197, 954437198, 3817748729, 3817748730 (list; graph; listen)
OFFSET

0,2

FORMULA

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

a(n)=a(n+1)+5a(n+2)-5a(n-3)-4a(n-4)+4a(n-5);

a(n)=(4/3)*A061547(n+1)-(1/3)*A166754(n)=(4/3)*A061547(n+1)-(1/3)*A000975(n)+(4/3)*A011377(n-2).

CROSSREFS

Sequence in context: A082198 A098871 A146477 this_sequence A014454 A136324 A128367

Adjacent sequences: A166750 A166751 A166752 this_sequence A166754 A166755 A166756

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Oct 21 2009

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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