For the series: 
     1 2 3 4 5 6 7 8 9 10 

The partial sums: 
     1 3 6 10 15 21 28 36 45 55  should each equal (N*N + N)/2

The partial products: 
     1 2 6 24 120 720 5040 40320 362880 3628800  should each equal N!