aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

tasks a-s

Browse source
This commit is contained in:
Ingy döt Net 2013-04-10 23:57:08 -07:00
parent 47bf37c096
commit b83f433714
12433 changed files with 156208 additions and 123 deletions
Download patch file Download diff file Expand all files Collapse all files

12
Task/Catalan-numbers/Racket/catalan-numbers.rkt Normal file
View file

@ -0,0 +1,12 @@
#lang racket
(require planet2)
; (install "this-and-that") ; uncomment to install
(require memoize/memo)
(define/memo* (catalan m)
(if (= m 0)
1
(for/sum ([i m])
(* (catalan i) (catalan (- m i 1))))))
(map catalan (range 1 15))