%I A127008
%S A127008 1,1,2,4,3,7,6,5,4,7,6,5,12,11,10,9,8,7,6,12,11,10,9,8,7,12,11,10,9,8,
%T A127008 12,11,10,9,16,15,14,13,12,11,10,16,15,14,13,12,11,16,15,14,13,12,24,23,
%U A127008 22,21,20,19,18,17,16,15,14,13,24,23,22,21,20,19,18,17,16,15,14,24,23
%N A127008 a(0)=1. For n>=1, n-th run consists of the integers in descending order 
               of a(n-1)+n-1 through n.
%H A127008 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%e A127008 The sequence grouped by descending runs, where the n-th run, for n>=1, 
               consists of a(n-1) integers: 1, (1), (2), (4, 3), (7, 6, 5, 4), (7, 
               6, 5), (12, 11, 10, 9, 8, 7, 6), (12, 11, 10, 9, 8, 7), (12, 11, 
               10, 9, 8), (12, 11, 10, 9), ...
%t A127008 f[l_List] := Block[{n = Length[l]},Append[l, Range[Flatten[l][[n]] + 
               n - 1, n, -1]]];Flatten@Nest[f, {{1}}, 15] (*Chandler*)
%Y A127008 Sequence in context: A065579 A056536 A108228 this_sequence A064274 A035513 
               A114537
%Y A127008 Adjacent sequences: A127005 A127006 A127007 this_sequence A127009 A127010 
               A127011
%K A127008 easy,nonn
%O A127008 0,3
%A A127008 Leroy Quet Jan 02 2007
%E A127008 Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jan 04 2007