OFFSET
0,1
COMMENTS
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (2, -1).
FORMULA
a(n) = (8 + n)*(9 + n)/2 = A000217(8+n) for 0 <= n <= 8, a(n) = a(n-1) + 17 for n >= 9.
G.f.: (36 - 63*x + 28*x^2 - x^10)/(1 - x)^3. - G. C. Greubel, Jul 13 2016
MATHEMATICA
CoefficientList[Series[(36 - 63*x + 28*x^2 - x^10)/(1 - x)^3, {x, 0, 50}], x] (* G. C. Greubel, Jul 13 2016 *)
Join[Table[((8+n)(9+n))/2, {n, 0, 8}], NestList[17+#&, 153, 80]] (* Harvey P. Dale, Apr 06 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Nov 18 2009
STATUS
approved