OFFSET
1,1
COMMENTS
LINKS
Zak Seidov, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Mean/@Partition[Prime[Range[15000]], 2, 1], IntegerQ[(Sqrt[1+24#]-1)/6]&] (* Harvey P. Dale, Feb 02 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Feb 01 2012
STATUS
approved