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A100285 Expansion of (1+5x^2)/(1-x+x^2-x^3). +0
2
1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1 (list; graph; listen)
OFFSET

0,3

COMMENT

This sequence is periodic. - T. D. Noe (noe(AT)sspectra.com), Nov 09 2006

FORMULA

a(n)=a(n-1)-a(n-2)+a(n-3); a(n)=3-2cos(pi*n/2)-2sin(pi*n/2); a(n)=mod(A100284(n), 8).

a(n)=1/2*{3*(n mod 4)+[(n+1) mod 4]-[(n+2) mod 4]+[(n+3) mod 4]} - Paolo P. Lava (ppl(AT)spl.at), Nov 21 2006

CROSSREFS

Adjacent sequences: A100282 A100283 A100284 this_sequence A100286 A100287 A100288

Sequence in context: A046585 A046584 A046599 this_sequence A046568 A046571 A046095

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Nov 11 2004

EXTENSIONS

Corrected by T. D. Noe (noe(AT)sspectra.com), Nov 09 2006

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Last modified October 13 02:37 EDT 2008. Contains 145008 sequences.


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