OFFSET
1,1
COMMENTS
In A065308 each odd prime seems to appear once or twice. Prime 2 arises there 3 times.
LINKS
Harry J. Smith, Table of n, a(n) for n = 1..1000
MATHEMATICA
With[{s = Array[Prime[# - PrimePi[#]] &, 120]}, Most@ Select[Split[s], Length@ # == 1 &][[All, 1]] ] (* Michael De Vlieger, Jun 19 2018 *)
PROG
(PARI) { n=0; p=1; f=2; m=1; for (i=1, 10^9, a=0; p=nextprime(p + 1); while (p==f, a++; m++; f=prime(m - primepi(m))); if (a==1, write("b065312.txt", n++, " ", p); if (n==1000, return)) ) } \\ Harry J. Smith, Oct 16 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Oct 29 2001
STATUS
approved