%I A077746
%S A077746 1,2,7,168,380002722841984290048000
%N A077746 Group the natural numbers such that the n-th group contains p(n-1) numbers, 
               where p(n-1) is the product of the members of (n-1)-th group, starting 
               with the first group which has one term: (1), (2), (3, 4), (5, 6, 
               7, 8, 9, 10, 11, 12, 13, 14, 15, 16), (17, 18, ..., 871782912015, 
               871782912016), ... Sequence contains the sum of the groups.
%C A077746 a(6) = (871782912016!/16!)[(871782912016!/16!)+1]/2 - 136 is too large 
               to include. - Sam Alexander (amnalexander(AT)yahoo.com), Oct 26 2003
%Y A077746 Sequence in context: A062617 A064607 A005345 this_sequence A159034 A120381 
               A042359
%Y A077746 Adjacent sequences: A077743 A077744 A077745 this_sequence A077747 A077748 
               A077749
%K A077746 nonn
%O A077746 1,2
%A A077746 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 20 2002