n-th derivative of x^(x^x) at x=1.

Terms

a(0) =1a(1) =1a(2) =2a(3) =9a(4) =32a(5) =180a(6) =954a(7) =6524a(8) =45016a(9) =360144a(10) =3023640a(11) =27617832a(12) =271481880a(13) =2775329232a(14) =31188079272a(15) =350827041000