On the number of representations of $n$ by $ax^2+by(y-1)/2$, $ax^2+by(3y-1)/2$ and $ax(x-1)/2+by(3y-1)/2$
Volume 147 / 2011
Acta Arithmetica 147 (2011), 81-100
MSC: Primary 11E25; Secondary 11E16.
DOI: 10.4064/aa147-1-5
