OFFSET
0,1
COMMENTS
The sum of the reciprocals of the terms appears to converge.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..1000
MATHEMATICA
Prime[Accumulate[Range[0, 50]]+2] (* Harvey P. Dale, Aug 16 2014 *)
PROG
(PARI) triprimes(n) = { sr = 0; for(j=0, n, x = j*(j+1)/2+2; z = prime(x); sr+=1.0/z; print1(z, ", "); ); print(); /* print(sr); */}
(Magma) [NthPrime(n*(n+1) div 2+2): n in [0..50]]; // Vincenzo Librandi, Jun 08 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Cino Hilliard, Dec 20 2002
STATUS
approved