OFFSET
2,1
COMMENTS
Least m such that a(m)=2*n for n=1,2,3,... are: {2,3,14,7,6,5,15,28,21,24,13,...}. - Zak Seidov, May 10 2016
There are numbers k other than 2 such that a(k) = 4. The first few (up to 1000) are 129 189 369 435 549 555 561 819. Conjecture: every even integer greater than 2 occurs infinitely often in this sequence. - Franklin T. Adams-Watters, May 13 2016
LINKS
Zak Seidov, Table of n, a(n) for n = 2..10000
MATHEMATICA
Table[c=n^3; NextPrime[c]-NextPrime[c, -1], {n, 2, 80}] (* Harvey P. Dale, Sep 14 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Oct 21 2002
STATUS
approved