2538584domain: NAppears in sequencesn-th derivative of x^(((x^x)^x)^x) at x=1.at n=8A215710Eighth derivative of f_n at x=1, where f_n is the n-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways.at n=13A215838