OFFSET
0,1
REFERENCES
H. Brocard, Note #2049, L'Intermédiaire des Mathématiciens, 8 (1901), pp. 212-213.
LINKS
FORMULA
G.f.: 2*(1+x)/(1-10*x+x^2) . - R. J. Mathar, Mar 07 2022
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Mar 02 2022
STATUS
approved