OFFSET
0,2
LINKS
Winston de Greef, Table of n, a(n) for n = 0..2082
Index entries for linear recurrences with constant coefficients, signature (-3).
FORMULA
a(0) = 1; a(n) = -3*a(n-1), n >= 1.
G.f.: 1/(1+3*x).
a(n) = (-1)^n*A000244(n).
E.g.f.: 1/exp(3*x). - _Elmo R. Oliveira_, Dec 17 2023
MATHEMATICA
LinearRecurrence[{-3}, {1}, 28]
CoefficientList[Series[1/(1+3*x), {x, 0, 27}], x]
Table[(-3)^n, {n, 0, 27}]
PROG
(PARI) a(n)=(-3)^n \\ _Winston de Greef_, Mar 19 2023
CROSSREFS
KEYWORD
sign,easy
AUTHOR
_L. Edson Jeffery_, Apr 04 2022
STATUS
approved