OFFSET
1,6
FORMULA
Take the absolute value of the difference between counts of runs of 9 primes congruent to 1 mod 4 and 3 mod 4.
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Enoch Haga, Mar 02 2004
EXTENSIONS
a(9) from Rick L. Shepherd, Jul 15 2009
a(10) from Sean A. Irvine, Oct 25 2011
a(11) from Chai Wah Wu, Mar 18 2018
STATUS
approved