Yellowstone sequence: Difference between revisions
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→{{header|Forth}}
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: init 3 0 do i 1+ y i th ! loop ; ( --)
: show cr #yellow 0 do y i th ? loop ; ( --)
: loop1 begin 1+ over 2 gcd-y[] 1 = >r over 1 gcd-y[] 1 > r> or 0= until
▲ over 1 - cells y + @ over gcd 1 > r> or 0=
: loop2 over true swap 0 ?do over y i th @ = if 0= leave then loop ;
: yellow #yellow 3 do i 3 begin loop1 loop2 until y rot th ! loop ;
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