OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
Index entries for linear recurrences with constant coefficients, signature (1,2,3).
FORMULA
G.f.: x*(x^2-x-1)/(3*x^3+2*x^2+x-1).
MATHEMATICA
LinearRecurrence[{1, 2, 3}, {1, 2, 3}, 50]
CROSSREFS
KEYWORD
nonn
AUTHOR
Harvey P. Dale, Apr 26 2017
STATUS
approved