A258199 a(n) = largest term of A001563 <= n.

0, 1, 1, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18

Offset

0,5

Links

Antti Karttunen, Table of n, a(n) for n = 0..4319

Formula

a(n) = A001563(A258198(n)).

Mathematica

Table[# #! &@ NestWhile[# + 1 &, 0, # #! <= n &[# + 1] &], {n, 0, 96}] (* Michael De Vlieger, Aug 31 2016 *)

Prog

(Scheme, two variants)
(define (A258199 n) (let loop ((k 1) (f 1)) (if (> (* k f) n) (* (- k 1) (/ f k)) (loop (+ k 1) (* (+ k 1) f)))))
(define (A258199 n) (A001563 (A258198 n)))

Crossrefs

Cf. A001563, A258198, A256450, A276334.

Sequence in context: A141248 A273339 A088899 * A290205 A066014 A080678

Adjacent sequences: A258196 A258197 A258198 * A258200 A258201 A258202

Keyword

nonn

Author

Antti Karttunen, May 23 2015

Status

approved