OFFSET
1,1
COMMENTS
Minimal difference d=p2-p1 is 2 while d may be arbitrarily large.
For n<10^7 largest d is for n=2435971: 14*n=34103594, p1=17051707, p2=17051887, d=p2-p1=180.
Numbers k such that 7*k is in A145025. - Robert Israel, Jun 17 2019
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
3*14=42=19+23,d=4; 6*14=84=41+43,d=2; 8*14=112=53+59,d=6.
MAPLE
filter:= proc(n) local t;
nextprime(7*n)+prevprime(7*n)=14*n;
end proc:
select(filter, [$1..1000]); # Robert Israel, Jun 17 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Sep 14 2009
STATUS
approved