|
|
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
|
|
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
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|