OFFSET
1,1
COMMENTS
The sequence is highly non-monotonic. a(n) appears in the correlation coefficient between digits of p(n) and their indices.
FORMULA
a(n) = Sum_i [i*(i-th digit)] for n-th prime
EXAMPLE
a(7)=15 because p[7]=17 and 1*1+2*7=15
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Zak Seidov, Feb 20 2004
STATUS
approved