table=:1 :'[ ((u stringu)&;@,[EMAIL PROTECTED],.]) ] over u/'
stringu=:1 :'5!:5<''u'' '
over=:({.;}.)@":@,
(i.5) * table i.5
┌─┬───────────┐
│*│0 1 2 3 4│
├─┼───────────┤
│0│0 0 0 0 0│
│1│0 1 2 3 4│
│2│0 2 4 6 8│
│3│0 3 6 9 12│
│4│0 4 8 12 16│
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