Number of compositions of 2n into parts with distinct multiplicities and with exactly n parts.

A321772

Number of compositions of 2n into parts with distinct multiplicities and with exactly n parts.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =4a(4) =5a(5) =6a(6) =142a(7) =428a(8) =1269a(9) =3874a(10) =20336a(11) =114522a(12) =429002a(13) =1743184a(14) =6456192a(15) =23749014a(16) =93997909a(17) =368890906a(18) =1122546076a(19) =4496925530a(20) =17437145160a(21) =76147395524a(22) =310155556998

External references