A $q$-Clausen-Orr type formula and its applications
  We show that certain terminating $_{6}\phi_5$ series can be factorized into a product of two $_{3}\phi_{2}$ series. As applications we prove a summation formula for a product of two $q$-Delannoy numbers along with some congruences for sums involving $q$-Delannoy numbers. This confirms three recent conjectures of the second author. 
Hong-Fang Guo, Victor J. W. Guo, Jiang Zeng
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