OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (2,-1,0,0,0,0,0,0,1,-2,1).
FORMULA
G.f.: x*(x^2+1)*(x^8-x^7+x^5-x^4-x^3+x^2-1)/((x-1)^3*(x^2+x+1)*(x^6+x^3+1)). [Colin Barker, Sep 23 2012]
MATHEMATICA
a=9; b=0;
Table[n+Floor[(a*n+b)^(1/2)], {n, 100}]
Table[n-1+Ceiling[(n*n-b)/a], {n, 80}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jan 09 2011
STATUS
approved