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

Terms

a(0) =1a(1) =1a(2) =4a(3) =18a(4) =124a(5) =950a(6) =8688a(7) =89600a(8) =1038392a(9) =13309272a(10) =186471480a(11) =2837173152a(12) =46466835072a(13) =815532508440