I'm trying to define a sequence, but I think I'm doing it wrong.

a:=1..15

L_1:=4
L_a:=L_(a-1)+1

This in my mind defines a sequence, starting with 4 and incrementing by 1 for 15 steps. I keep getting 'Requested Matrix Element does not exist'.

What am I doing wrong? Cheers.

Wrote

I'm trying to define a sequence, but I think I'm doing it wrong.

a:=1..15

L_1:=4
L_a:=L_(a-1)+1

This in my mind defines a sequence, starting with 4 and incrementing by 1 for 15 steps. I keep getting 'Requested Matrix Element does not exist'.

What am I doing wrong? Cheers.

You can use a for loop:

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