

A227346


Distance between consecutive pairs of primes differing by 6 (p, p+6).


2



2, 4, 2, 4, 6, 8, 6, 4, 6, 6, 8, 6, 6, 10, 14, 4, 2, 4, 24, 20, 6, 10, 6, 18, 2, 30, 4, 6, 18, 6, 6, 8, 6, 30, 4, 20, 16, 6, 14, 6, 10, 50, 10, 14, 4, 42, 38, 16, 6, 8, 16, 6, 8, 6, 6, 28, 6, 6, 24, 50, 6, 18, 70, 2, 30, 4, 20, 4, 60, 6, 24, 6, 14, 22, 20, 30
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Eric Weisstein's World of Mathematics, Sexy Primes
Eric Weisstein's World of Mathematics, Prime Constellation


FORMULA

a(n) = A023201(n+1)  A023201(n).  Zak Seidov, Sep 20 2013


MAPLE

with(numtheory): pre:=0: for n from 1 to 3000 do if isprime(n) and isprime(n+6) then if pre<>0 then printf("%d, ", npre) fi: pre:=n fi od: # adapted from original program by C. Ronaldo for A053320


MATHEMATICA

Differences[Select[Prime[Range[200]], PrimeQ[# + 6] &]] (* T. D. Noe, Jul 09 2013 *)


CROSSREFS

Cf. A023201 (n and n+6 are primes).
Cf. A053320 (differences for Cousin primes).
Sequence in context: A128859 A047975 A112791 * A296141 A286536 A318768
Adjacent sequences: A227343 A227344 A227345 * A227347 A227348 A227349


KEYWORD

nonn


AUTHOR

Luca Pezzullo, Jul 08 2013


STATUS

approved



