a(n) is the smallest positive integer such that A160371(a(n)) > n.
Table of n, a(n) for n=0..9.
a(8) = 253, so the number 253 cannot be obtained as the number of linear extensions of a poset of size 8, but every integer from 1 to 252 can.
Sequence in context: A051920 A286350 A023105 * A011784 A302487 A032252
Adjacent sequences: A281720 A281721 A281722 * A281724 A281725 A281726
François Labelle, Jan 28 2017