Partial sums of A014817.

Terms

a(0) =1a(1) =3a(2) =7a(3) =14a(4) =23a(5) =36a(6) =54a(7) =78a(8) =107a(9) =141a(10) =183a(11) =234a(12) =291a(13) =358a(14) =436a(15) =526a(16) =623a(17) =733a(18) =855a(19) =992a(20) =1141a(21) =1304a(22) =1484a(23) =1682a(24) =1893a(25) =2119a(26) =2365a(27) =2630a(28) =2911a(29) =3214