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A092654
Number of consecutive prime runs of 7 primes congruent to 1 mod 4 below 10^n.
2
0, 0, 0, 0, 2, 45, 553, 5336, 52807, 508378, 4855972
OFFSET
1,5
FORMULA
Generate the prime sequence with primes labeled 1 mod 4 or 3 mod 4. Add count of primes to sequence if just 7 primes occur before interruption by a prime congruent to 3 mod 4.
EXAMPLE
a(5)=2 because 2 sets of 7 primes occur below 10^5, each run interrupted by a prime congruent to 3 mod 4.
CROSSREFS
Sequence in context: A325935 A360065 A222997 * A374863 A209606 A100101
KEYWORD
more,nonn
AUTHOR
Enoch Haga, Mar 02 2004
EXTENSIONS
a(9)-a(11) from Chai Wah Wu, Mar 18 2018
STATUS
approved