OFFSET
1,1
COMMENTS
As N increases, the ratio sum(a(n)/n^2)/N for n = 1 to N tends to 2.
LINKS
Pierre CAMI, Table of n, a(n) for n = 1..272
EXAMPLE
10^1+13 = 23, 23 and 29 primes of gap 6 so a(1)=13.
CROSSREFS
KEYWORD
nonn
AUTHOR
Pierre CAMI, Jul 11 2013
STATUS
approved