Generator for the finite sequence A053016.

Terms

a(0) =4a(1) =6a(2) =8a(3) =12a(4) =20a(5) =34a(6) =56a(7) =88a(8) =132a(9) =190a(10) =264a(11) =356a(12) =468a(13) =602a(14) =760a(15) =944a(16) =1156a(17) =1398a(18) =1672a(19) =1980a(20) =2324a(21) =2706a(22) =3128a(23) =3592a(24) =4100a(25) =4654a(26) =5256a(27) =5908a(28) =6612a(29) =7370