OFFSET
0,1
REFERENCES
R. K. Guy, personal communication.
LINKS
Index entries for linear recurrences with constant coefficients, signature (2,1,0,-1,-1,-1,-1).
FORMULA
G.f.: ( -(x-1)*(x^4+2*x^3+3*x^2+3*x+2) ) / ( 1-2*x-x^2+x^4+x^5+x^6+x^7 ). - R. J. Mathar, Feb 11 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved