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Hofstadter Figure-Figure sequences: Difference between revisions
→version 1: sped up the REXX program by a couple of orders of magnitude.
m (→version 1: changed a comment.) |
(→version 1: sped up the REXX program by a couple of orders of magnitude.) |
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ffs: procedure expose r. s. rr.; parse arg n /*search for ¬null R│S #.*/
if s.n==0 then do k=1 for n /* [↓] 1st IF is a short circuit*/
if s.k\==0 then
call ffr k /*define R.k via FFR subroutine*/
km=k-1; _=s.km+1 /*the next S number, possibly. */
_=_+rr._; s.k=_ /*define an element of S array.*/
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