1,3
Take the absolute value of the difference between counts of runs of 3 primes congruent to 1 mod 4 and 3 mod 4.
a(3)=3 because in A092642 the count is 4 and in A092643 the count is 1. 4-1=3.
Cf. A092642 A092643.
Sequence in context: A158939 A173795 A026345 * A006281 A157705 A185447
Adjacent sequences: A092641 A092642 A092643 * A092645 A092646 A092647
more,nonn
Enoch Haga (Enokh(AT)comcast.net), Mar 02 2004