1 7 13 19 25 what is the 1000th number in this series of numbers

1 7 13 19 25 what is the 1000th number in this series of numbers

The general term formula of arithmetic sequence an = a1 + (n-1) d
D is the tolerance. The tolerance of the sequence is 6
If the first item is 1, the 1000th item is a1000 = 1 + 999d = 5995