It doesn't strictly answer the "from the command line" part, but since you say you manually typed out the lists, allow me to present: The Easy and Fast Way to type out your lists, using
The Long Version
vim by typing:
vim at the command line.
Enter insert mode by pressing
i. Type the first line:
1|1, and press
<Esc> to exit insert mode.
q to begin recording a macro, and press
x (arbitrarily) to record the macro into register "x".
yy to copy the current line and
p to paste it. This will also put your cursor at the beginning of the newly pasted line. Then, type
<C-a> (Control-A) to increment the number under the cursor.
t, to move your cursor forward to just before the next comma (which puts it on the second number on the line). Type
<C-a> again to increment this number also.
q to stop recording the macro.
Now all that remains is to play back the macro as many times as you want. We'll say 15, just for demonstration. Type
15@x and your macro will be replayed 15 times, so your screen will now show your list from 1 to 17. Then if you want more lines, you can just type, for instance,
If you have too many lines, type the letter
k to move up in the file and
j to go down. When you are on the first line to be deleted, you can delete from there to the end of the file by typing
The Short Version
To generate the list from 1 to 31, open
vim by typing
vim<Enter> at the command prompt, then press the following keys:
I'm fully familiar with
echo and I understand the various other answers that have been posted. It's my considered opinion that the best tool for this job is
vim, unless you actually need to script the text generation.