window.twttr = (function(d, s, id) { var js, fjs = d.getElementsByTagName(s)[0], t = window.twttr || {}; if (d.getElementById(id)) return t; js = d.createElement(s); js.id = id; js.src = "https://platform.twitter.com/widgets.js"; fjs.paren…

(define (fib-let n) (let fib-loop((max n) (nth 0) (n1 0) (n2 1)) (if (>= nth max) n1 (fib-loop max (+ nth 1) n2 (+ n1 n2)))))