OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Book Graph
Eric Weisstein's World of Mathematics, Minimal Dominating Set
Index entries for linear recurrences with constant coefficients, signature (3,-2).
FORMULA
a(n) = A062709(n) = 2^n + 3 for n > 1.
G.f.: x*(6 - 11*x + 2*x^2)/((-1 + x)*(-1 + 2*x)).
E.g.f.: exp(x)*(3 + exp(x)) - 4 + x. - Stefano Spezia, Sep 04 2021
MATHEMATICA
Join[{6}, 2^Range[2, 20] + 3]
CoefficientList[Series[(6 - 11 x + 2 x^2)/((-1 + x) (-1 + 2 x)), {x, 0, 20}], x]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Eric W. Weisstein, Sep 04 2021
STATUS
approved