OFFSET
0,2
REFERENCES
Jolley, Summation of Series, Dover (1961), eq. (46) on page 8.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..3000
Index entries for linear recurrences with constant coefficients, signature (7,-18,20,-8)
FORMULA
PROG
(Magma) [2^n*(n^2-n+4)-4: n in [0..30]]; // Vincenzo Librandi, Oct 05 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. J. Mathar, Oct 03 2011
STATUS
approved