Question 879195
See problem #880183 for an explanation
See link below
http://www.algebra.com/algebra/homework/Sequences-and-series/Sequences-and-series.faq.question.880183.html
1    3    4  2  2   2 2 2
4    7    6  4  4   4 4 2
11   13   10 8  8   8 6
24   23   18 16 16  14
47   41   34 32 30
88   75   66  62
163  141  128
304  269
573