s6-portable-utils
Software
skarnet.org
 The s6-seq program 
 s6-seq prints a sequence of numbers.
 Interface 
     s6-seq [ -w ] [ -s separator ] limits
 -  limits can be one, two or three arguments.
 
  -  Three arguments are interpreted as first,
increment and last, in this order. 
-  Two arguments are interpreted as first and
last, and increment defaults to 1. 
-  One argument is interpreted as last, and
first and increment both default to 1. 
 
-  s6-seq prints all unsigned integers from first
to last inclusive, with a step of increment,
with a newline after each integer.
It then exits 0. 
 Options 
 -  -w : fixed width. The numbers will all be printed
with the same width; smaller numbers will have leading 0
characters. 
-  -s sep : print sep after
each number. Default is a newline. If sep
is the empty string, a null character will be printed. 
 Notes 
 s6-seq is similar to the GNU seq program. However, it
does not handle negative numbers, floating point numbers or
printf-style formatting.