OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..48
MATHEMATICA
Map[#*(#+1)/2 &, MersennePrimeExponent[Range[48]]] (* Amiram Eldar, Oct 21 2024 *)
CROSSREFS
KEYWORD
nonn,changed
AUTHOR
Omar E. Pol, May 08 2008
STATUS
approved