OFFSET
1,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..48 (terms 1..47 from Harvey P. Dale)
MATHEMATICA
(#(#-1))/2&/@MersennePrimeExponent[Range[47]] (* Harvey P. Dale, Aug 13 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, May 10 2008
EXTENSIONS
a(24)-a(32) from Harvey P. Dale, Aug 13 2021
STATUS
approved