OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (7,-13,3,4).
FORMULA
From Colin Barker, May 22 2012: (Start)
a(n) = 7*a(n-1) - 13*a(n-2) + 3*a(n-3) + 4*a(n-4).
G.f.: 2*x^2*(1+x+x^2)/((1-x)*(1-4*x)*(1-2*x-x^2)). (End)
a(n) = 2^(2*n-1) - A001333(n+1) + 1. - Sean A. Irvine, Aug 23 2024
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. H. Hardin, Mar 22 2002
EXTENSIONS
An incorrect recurrence was deleted by N. J. A. Sloane, Sep 13 2009
More terms from Sean A. Irvine, Aug 23 2024
STATUS
approved