1,4

Table of n, a(n) for n=1..11.

Take the absolute value of the difference between counts of runs of 5 primes congruent to 1 mod 4 and 3 mod 4.

a(6)=52 because in A092648 the count is 344 and in A092649 the count is 396. 396 - 344 = 52.

Cf. A092648, A092649.

Sequence in context: A054210 A225778 A271442 * A221194 A104024 A233472

Adjacent sequences: A092647 A092648 A092649 * A092651 A092652 A092653

more,nonn

Enoch Haga, Mar 02 2004

a(9)-a(11) from Chai Wah Wu, Mar 18 2018

approved