OFFSET
1,1
LINKS
Colin Barker, Table of n, a(n) for n = 1..1000
Charles Kusniec, Modularity Study For U(L;C)=7L^2-7L-43
Index entries for linear recurrences with constant coefficients, signature (3,-3,1).
FORMULA
From Colin Barker, Jan 14 2018: (Start)
G.f.: -x*(43 - 100*x + 43*x^2) / (1 - x)^3.
a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) for n>3. (End)
E.g.f.: 43 + exp(x)*(-43 + 7*x^2). - Stefano Spezia, Oct 17 2019
MATHEMATICA
Array[7 #^2 - 7 # - 43 &, 48] (* Michael De Vlieger, Jan 11 2018 *)
LinearRecurrence[{3, -3, 1}, {-43, -29, -1}, 50] (* Harvey P. Dale, Jul 05 2021 *)
PROG
(PARI) Vec(-x*(43 - 100*x + 43*x^2) / (1 - x)^3 + O(x^60)) \\ Colin Barker, Jan 14 2018
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Charles Kusniec, Jan 11 2018
STATUS
approved