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A104062 Number of primes p(i) for i=1 to 20*10^n such that p(i+1)=p(i)+6 and p(i+2)=p(i)+12 and p(i+3)=p(i)+18, 4 consecutive primes in arithmetic progression 0 6 12 18. 0
1, 12, 64, 416, 2748, 19348 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

for i=1 to 20*10^1 (200) only one prime p(54)=251

251,257,263,269 consecutive primes in arithmetic progression 0,6,12,18

for i=1 to 20*10^2 (2000) 12 primes in arithmetic progression 0,6,12,18

for i=1 to 20*10^3 (20000) 64 primes in arithmetic progression 0,6,12,18

CROSSREFS

Sequence in context: A258617 A307061 A074359 * A232383 A003868 A304833

Adjacent sequences:  A104059 A104060 A104061 * A104063 A104064 A104065

KEYWORD

more,nonn

AUTHOR

Pierre CAMI, Mar 02 2005

EXTENSIONS

Definition clarified by Harvey P. Dale, Jul 01 2015

STATUS

approved

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Last modified May 26 17:16 EDT 2022. Contains 354092 sequences. (Running on oeis4.)