Primes between non-primes

[Eric Angelini]

Hello again,

This sequence is the twin of the previous one:

1,2,4,5,7,8,11,13,17,19,20,23,29,31,37,41,42,43,47,53,59,61,67,71,72...
N p N p p N  p  p  p  p  N  p  p  p  p  p  N  p  p  p  p  p  p  p  N
  1    2          4               5                    7  ...

Self-describing sequence : A(n) indicates the quantity of 
prime numbers which are between two successive non-primes.

(this is not an accurate definition neither :-(

If this is of interest, etc.

Best,
É.