Records in A000229.

Terms

a(0) =3a(1) =7a(2) =23a(3) =71a(4) =311a(5) =479a(6) =1559a(7) =5711a(8) =10559a(9) =18191a(10) =31391a(11) =422231a(12) =701399a(13) =3818929a(14) =9257329a(15) =22000801a(16) =36415991a(17) =48473881a(18) =175244281a(19) =427733329a(20) =3389934071a(21) =7979490791a(22) =36504256799a(23) =89206899239a(24) =121560956039a(25) =395668053479a(26) =513928659191