OFFSET
0,5
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..4320
PROG
(Scheme) (define (A258198 n) (let loop ((k 1) (f 1)) (if (> (* k f) n) (- k 1) (loop (+ k 1) (* (+ k 1) f)))))
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 23 2015
STATUS
approved