Partial sums of A084570.

Terms

a(0) =1a(1) =3a(2) =9a(3) =21a(4) =44a(5) =82a(6) =142a(7) =230a(8) =355a(9) =525a(10) =751a(11) =1043a(12) =1414a(13) =1876a(14) =2444a(15) =3132a(16) =3957a(17) =4935a(18) =6085a(19) =7425a(20) =8976a(21) =10758a(22) =12794a(23) =15106a(24) =17719a(25) =20657a(26) =23947a(27) =27615a(28) =31690a(29) =36200