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A092648 Number of consecutive prime runs of 5 primes congruent to 1 mod 4 below 10^n. 2
0, 0, 0, 3, 36, 344, 3491, 32628, 300541, 2771091, 25737994 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

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

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 3 mod 4.

EXAMPLE

a(6)=344 because 344 sets of 5 primes occur below 10^6, each run interrupted by a prime congruent to 3 mod 4.

CROSSREFS

Cf. A092649, A092650.

Sequence in context: A003691 A038146 A067444 * A026121 A055303 A274403

Adjacent sequences:  A092645 A092646 A092647 * A092649 A092650 A092651

KEYWORD

more,nonn

AUTHOR

Enoch Haga, Mar 02 2004

EXTENSIONS

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

STATUS

approved

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Last modified August 18 20:29 EDT 2018. Contains 313840 sequences. (Running on oeis4.)