Largest k such that k! < 2^(2^n).

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =8a(5) =12a(6) =20a(7) =34a(8) =57a(9) =98a(10) =170a(11) =300a(12) =536a(13) =966a(14) =1754a(15) =3210a(16) =5910a(17) =10944a(18) =20366a(19) =38064a(20) =71421a(21) =134480a(22) =254016a(23) =481176a(24) =913846a(25) =1739680a(26) =3318996a(27) =6344666a(28) =12150874a(29) =23310032