a(n) = n * A276086(n).

Terms

a(0) =0a(1) =2a(2) =6a(3) =18a(4) =36a(5) =90a(6) =30a(7) =70a(8) =120a(9) =270a(10) =450a(11) =990a(12) =300a(13) =650a(14) =1050a(15) =2250a(16) =3600a(17) =7650a(18) =2250a(19) =4750a(20) =7500a(21) =15750a(22) =24750a(23) =51750a(24) =15000a(25) =31250a(26) =48750a(27) =101250a(28) =157500a(29) =326250