%I #11 Jan 06 2019 13:47:56
%S 1,1,1,4,5,6,142,428,1269,3874,20336,114522,429002,1743184,6456192,
%T 23749014,93997909,368890906,1122546076,4496925530,17437145160,
%U 76147395524,310155556998,1417665712388,5528899930962,21923449788406,82833896451112,347234278501138
%N Number of compositions of 2n into parts with distinct multiplicities and with exactly n parts.
%H Vaclav Kotesovec, <a href="/A321772/b321772.txt">Table of n, a(n) for n = 0..131</a> (terms 0..100 from Alois P. Heinz)
%F a(n) = A242887(2n,n).
%e a(0) = 1: the empty composition.
%e a(1) = 1: 2.
%e a(2) = 1: 22.
%e a(3) = 4: 222, 114, 141, 411.
%Y Cf. A242887.
%K nonn
%O 0,4
%A _Alois P. Heinz_, Nov 18 2018