Records in A025017.

Terms

a(0) =4a(1) =6a(2) =12a(3) =30a(4) =124a(5) =418a(6) =1274a(7) =2512a(8) =3526a(9) =4618a(10) =7432a(11) =12778a(12) =26098a(13) =34192a(14) =37768a(15) =59914a(16) =88786a(17) =97768a(18) =112558a(19) =221942a(20) =237544a(21) =485326a(22) =642358a(23) =686638a(24) =1042078a(25) =1172918a(26) =2041402a(27) =2406448a(28) =4288574a(29) =4938848