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Tina Müller 2016-12-05 23:44:36 +01:00
parent 9dc3c2bb62
commit bba7bfd280
13208 changed files with 134745 additions and 0 deletions
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9
Task/Stern-Brocot-sequence/EchoLisp/stern-brocot-sequence-1.echolisp Normal file
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;; stern (2n ) = stern (n)
;; stern(2n+1) = stern(n) + stern(n+1)
(define (stern n)
(cond
(( < n 3) 1)
((even? n) (stern (/ n 2)))
(else (let ((m (/ (1- n) 2))) (+ (stern m) (stern (1+ m)))))))
(remember 'stern)