Partial sums of A263614 starting at n=2.

Terms

a(0) =2a(1) =4a(2) =8a(3) =12a(4) =20a(5) =28a(6) =44a(7) =59a(8) =89a(9) =115a(10) =167a(11) =209a(12) =293a(13) =357a(14) =485a(15) =578a(16) =764a(17) =894a(18) =1154a(19) =1330a(20) =1682a(21) =1914a(22) =2378a(23) =2677a(24) =3275a(25) =3653a(26) =4409a(27) =4879a(28) =5819a(29) =6395