Report - #A16 INTEGERS 17 (2017) - Colgate Universitymath.colgate.edu/~integers/r16/r16.pdf · INTEGERS: 17 (2017) 2 and n+m m Xn k=0 k 2n n+k 2m m+k 2 = n 2 2n n 2m m mX1 j=0 n+j n m+j m1

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