Sums of groups in A075635.

Terms

a(0) =1a(1) =13a(2) =29a(3) =61a(4) =97a(5) =167a(6) =257a(7) =373a(8) =523a(9) =701a(10) =911a(11) =1171a(12) =1487a(13) =1861a(14) =2203a(15) =2647a(16) =3181a(17) =3767a(18) =4373a(19) =5087a(20) =5897a(21) =6719a(22) =7639a(23) =8623a(24) =9743a(25) =10903a(26) =12203a(27) =13591a(28) =15031a(29) =16547