OFFSET
1,2
COMMENTS
This sequence gives a linearly increasing triangle shaped form on plotting.
LINKS
Index entries for linear recurrences with constant coefficients, signature (1,0,0,1,-1).
FORMULA
MATHEMATICA
LinearRecurrence[{1, 0, 0, 1, -1}, {1, 5, 13, 25, 5}, 67] (* James C. McMahon, Oct 19 2024 *)
PROG
(PARI) Vec(-x*(-1-4*x-8*x^2-12*x^3+21*x^4)/((1+x)*(x^2+1)*(x-1)^2) + O(x^75)) \\ Jinyuan Wang, Jun 07 2020
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, Sep 07 2006
EXTENSIONS
Definition replaced by recurrence - The Assoc. Editors of the OEIS, Oct 14 2009
More terms from Jinyuan Wang, Jun 07 2020
STATUS
approved