-3449domain: ZAppears in sequencesNumerator of [x^n] of the Taylor series arccosh(exp(x) - arcsin(x)).at n=12A013306First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 181", based on the 5-celled von Neumann neighborhood.at n=31A270629