Partial sums of A080715.

Terms

a(0) =1a(1) =3a(2) =9a(3) =19a(4) =41a(5) =71a(6) =113a(7) =171a(8) =241a(9) =319a(10) =401a(11) =503a(12) =633a(13) =823a(14) =1033a(15) =1343a(16) =1673a(17) =2031a(18) =2413a(19) =2855a(20) =3317a(21) =3795a(22) =4357a(23) =5015a(24) =5757a(25) =6595a(26) =7457a(27) =8427a(28) =9465a(29) =10687