OFFSET
0,3
REFERENCES
M. Kauers and P. Paule, The Concrete Tetrahedron, Springer 2011, p. 22.
EXAMPLE
1+x+(1/2)*x^2+(1/3)*x^3+(1/6)*x^4+(7/60)*x^5+(19/360)*x^6+(3/70)*x^7+(5/336)*x^8+(13/756)*x^9+...
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
N. J. A. Sloane, Jul 31 2013
STATUS
approved