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%I #6 Nov 16 2019 10:20:20
%S 1,2,4,7,12,34,187,2959,48247,19840327,2510415286599,
%T 521698566186280239802,4471373101273208723788137885117929799,
%U 1253543310663256238898448262146285580160101720412514117844237110599
%N Initial term of n-th group in A079798.
%F For n>1, a(n) = A079801(n-1) + 1. Also, a(n) = (sqrt(8*(A079798(1) + A079798(2) + ... + A079798(n-1)) + 1) + 1) / 2. - _Max Alekseyev_, May 08 2009
%Y Cf. A079798, A079799, A079801, A075633.
%K nonn
%O 1,2
%A _Amarnath Murthy_, Feb 05 2003
%E Extended by _Max Alekseyev_, May 08 2009
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