Table of n, a(n) for n=1..8.
Take the absolute value of differences between counts of runs of single nonprimes congruent to 1 mod 4 and 3 mod 4
a(3)=2 because in A093183 the count is 74 and in A093184 the count is 76. 76-74=2.
Cf. A093183 A093184 A092636 A092637 A092638.
Sequence in context: A103019 A101823 A242421 * A082459 A129831 A101713
Adjacent sequences: A093394 A093395 A093396 * A093398 A093399 A093400
Enoch Haga, Mar 30 2004