

A125568


a(0)=1. For n>=1, nth run consists of the integers (in ascending order) of n through a(n1)+n1.


0



1, 1, 2, 3, 4, 4, 5, 6, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10, 11, 8, 9, 10, 11, 12, 13, 9, 10, 11, 12, 13, 10, 11, 12, 13, 14, 15, 11, 12, 13, 14, 15, 16, 17, 12, 13, 14, 15, 16, 17, 18, 19, 13, 14, 15, 16, 17, 18, 14, 15, 16, 17, 18, 19, 20, 15, 16, 17, 18, 19, 20, 21, 22, 16, 17, 18
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OFFSET

0,3


LINKS



EXAMPLE

The sequence grouped by (ascending) runs, where the nth run, for n>=1, consists of a(n1) integers: 1, (1), (2), (3, 4), (4, 5, 6), (5, 6, 7, 8), (6, 7, 8, 9), (7, 8, 9, 10, 11), (8, 9, 10, 11, 12, 13), (9, 10, 11, 12, 13), ...


MATHEMATICA

f[l_List] := Block[{n = Length[l]}, Append[l, Range[n, Flatten[l][[n]] + n  1]]]; Flatten@Nest[f, {{1}}, 16] (* Ray Chandler, Jan 05 2007 *)


CROSSREFS



KEYWORD

easy,nonn


AUTHOR



EXTENSIONS



STATUS

approved



