Partial sums of A073602.

Terms

a(0) =2a(1) =9a(2) =20a(3) =49a(4) =66a(5) =169a(6) =306a(7) =437a(8) =460a(9) =609a(10) =682a(11) =999a(12) =1066a(13) =1247a(14) =1410a(15) =1537a(16) =1770a(17) =2257a(18) =2814a(19) =2911a(20) =3504a(21) =3871a(22) =3984a(23) =4183a(24) =5432a(25) =7575a(26) =7622a(27) =8239a(28) =8502a(29) =9379