Engel expansion for i^i = exp(-Pi/2).

Terms

a(0) =5a(1) =26a(2) =42a(3) =45a(4) =84a(5) =2577a(6) =6837a(7) =18441a(8) =43190a(9) =65404a(10) =502536a(11) =2987594a(12) =5828519a(13) =41429808a(14) =431610158a(15) =1524989277a(16) =4301621811a(17) =5681026585a(18) =21585646103a(19) =26950130930a(20) =174893227975a(21) =334043333925a(22) =453875893331a(23) =633636954317