Engel expansion for tan(1).

Terms

a(0) =1a(1) =2a(2) =9a(3) =30a(4) =5838a(5) =7748a(6) =18941a(7) =20860a(8) =884009a(9) =919276a(10) =6366597a(11) =74329482a(12) =178532068a(13) =2130862251a(14) =2162384953a(15) =2614341660a(16) =4416513965a(17) =10812791039a(18) =11799700554a(19) =20743576863a(20) =36600453328a(21) =76931780134a(22) =109063095528