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A092649
Number of consecutive prime runs of 5 primes congruent to 3 mod 4 below 10^n.
2
0, 0, 1, 5, 37, 396, 3606, 32546, 300897, 2775809, 25740438
OFFSET
1,4
FORMULA
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.
EXAMPLE
a(6)=396 because 396 sets of 5 primes occur below 10^6, each run interrupted by a prime congruent to 1 mod 4.
CROSSREFS
Sequence in context: A258378 A368322 A273954 * A179923 A190628 A333285
KEYWORD
more,nonn
AUTHOR
Enoch Haga, Mar 02 2004
EXTENSIONS
a(9)-(11) from Chai Wah Wu, Mar 18 2018
STATUS
approved