5n-5, because its the 5 time table (called 5n) minus 5 each time
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15(1)
The nth term in this sequence is 4n + 3.
The nth term is: 5n
1, 3, 6, 10, 15 ,21 The nth term for the sequence (where you replace n with the term you want to find) is: (n(n+1))/2
The nth term is 18 -3n and so the next term will be 3