A092649 - OEIS

%I #10 Mar 18 2018 17:25:55

%S 0,0,1,5,37,396,3606,32546,300897,2775809,25740438

%N Number of consecutive prime runs of 5 primes congruent to 3 mod 4 below 10^n.

%F Generate the prime sequence with primes labeled 1 mod 4 or 3 mod 4. Add count of primes to sequence if just 5 primes occur before interruption by a prime congruent to 1 mod 4.

%e a(6)=396 because 396 sets of 5 primes occur below 10^6, each run interrupted by a prime congruent to 1 mod 4.

%Y Cf. A092648, A092650.

%K more,nonn

%O 1,4

%A _Enoch Haga_, Mar 02 2004

%E a(9)-(11) from _Chai Wah Wu_, Mar 18 2018