%I #6 Nov 16 2019 10:19:07
%S 1,3,6,11,33,186,2958,48246,19840326,2510415286598,
%T 521698566186280239801,4471373101273208723788137885117929798,
%U 1253543310663256238898448262146285580160101720412514117844237110598
%N Final term of n-th group in A079798.
%F For n>1, a(n) = A079800(n+1) - 1. Also, a(n) = (sqrt(8*(A079798(1) + A079798(2) + ... + A079798(n)) + 1) - 1) / 2. - _Max Alekseyev_, May 08 2009
%Y Cf. A079798, A079799, A079800, A075634, A160277.
%K nonn
%O 1,2
%A _Amarnath Murthy_, Feb 05 2003
%E Extended by _Max Alekseyev_, May 08 2009