OFFSET
1,1
COMMENTS
Semiprime analog of A117048 Prime numbers that are expressible as the sum of two triangular numbers.
MATHEMATICA
With[{nn=60}, Take[Union[Select[Total/@Tuples[Accumulate[Range[0, nn]], 2], PrimeOmega[ #] ==2&]], nn]] (* Harvey P. Dale, Nov 04 2020 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Aug 02 2006
EXTENSIONS
Missing a(2) and a(19)-a(53) from Giovanni Resta, Jun 13 2016
STATUS
approved