"EFJ" (unordered, size, labeled) transform of 2,2,2,2,...

Terms

a(0) =1a(1) =2a(2) =2a(3) =14a(4) =18a(5) =62a(6) =566a(7) =1094a(8) =3954a(9) =17150a(10) =242982a(11) =573014a(12) =2717094a(13) =11553622a(14) =74420950a(15) =1427746334a(16) =4237820914a(17) =22743623742a(18) =116389345094a(19) =709019767190