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A187892 a(0)=0, a(1)=6, a(n)=a(n-1)+a(n-2)-1. 0
0, 6, 5, 10, 14, 23, 36, 58, 93, 150, 242, 391, 632, 1022, 1653, 2674, 4326, 6999, 11324, 18322, 29645, 47966, 77610, 125575, 203184, 328758, 531941, 860698, 1392638, 2253335, 3645972, 5899306, 9545277, 15444582, 24989858, 40434439, 65424296, 105858734 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
G.f. -x^2*(-6+7*x) / ( (x-1)*(x^2+x-1) ). - R. J. Mathar, Mar 15 2011
a(n) = 1+A022130(n-3), n>2. - R. J. Mathar, Mar 15 2011
MATHEMATICA
Join[{a=0, b=6}, Table[c=a+b-1; a=b; b=c, {n, 100}]]
LinearRecurrence[{2, 0, -1}, {0, 6, 5}, 40] (* Harvey P. Dale, Aug 17 2019 *)
CROSSREFS
Sequence in context: A251859 A100884 A309549 * A046615 A103132 A046627
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified March 19 07:31 EDT 2024. Contains 370955 sequences. (Running on oeis4.)