First differences are
4, 7, 10, 13, 16.
Second differences are all 3.
The Nth term will be given by
0 + (n-1)/1*(4 + (n-2)/2*(3))
where 0, 4, and 3 are the initial term of each of the series.
This can be written as
n(3n-1)/2 - 1
4, 7, 10, 13, 16.
Second differences are all 3.
The Nth term will be given by
0 + (n-1)/1*(4 + (n-2)/2*(3))
where 0, 4, and 3 are the initial term of each of the series.
This can be written as
n(3n-1)/2 - 1
