Post #2782456

It's a sequence of numbers where the next number is a fixed multiple of the previous one. 1 2 4 8 16 32 ... Is a sequence with a ratio of 2. 96 48 24 12 6 3 ... Is the sequence from the question with a ratio of 1/2. You see that elements 2 and 4 (counting from zero) sum to 30 and elements 3 and 5 sum to 15. In general, the sequence can be expressed as a_k = c r^k for some starting value c and the ratio r.