Zero followed by partial sums of A059100, starting at n=1.

Terms

a(0) =0a(1) =3a(2) =9a(3) =20a(4) =38a(5) =65a(6) =103a(7) =154a(8) =220a(9) =303a(10) =405a(11) =528a(12) =674a(13) =845a(14) =1043a(15) =1270a(16) =1528a(17) =1819a(18) =2145a(19) =2508a(20) =2910a(21) =3353a(22) =3839a(23) =4370a(24) =4948a(25) =5575a(26) =6253a(27) =6984a(28) =7770a(29) =8613