OFFSET
1,3
COMMENTS
Number of quadratic polynomials with coefficients from {1..n} for which both roots are integers.
A generalization of A006318.
LINKS
Dorin Andrica and Eugen J. Ionascu, On the number of polynomials with coefficients in [n], An. St. Univ. Ovidius Constanta, Vol. 22(1),2014, 13-23.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 22 2014
STATUS
approved