Question

The first three terms of a sequence are 6, 12, 30, . . .

Which is the first term in this sequence to be greater than 300?

Answer 1

306

Explanation:

Take a list of primes and multiply each with the prime+1:

2*3 = 6

3*4 = 12

5*6 = 30

7*8 = 56

11*12 = 132

13*14 = 182

17*18 = 306