Final term of n-th group in A075383.

Terms

a(0) =1a(1) =4a(2) =9a(3) =20a(4) =30a(5) =54a(6) =56a(7) =104a(8) =126a(9) =160a(10) =154a(11) =264a(12) =234a(13) =364a(14) =390a(15) =480a(16) =374a(17) =630a(18) =475a(19) =780a(20) =819a(21) =946a(22) =713a(23) =1200a(24) =1100a(25) =1326a(26) =1350a(27) =1596a(28) =1160a(29) =1950