34458domain: NAppears in sequencesG.f.: 1/(1 - x - x^2 - 2*x^3 - 3*x^4 - 2*x^5 - x^6).at n=14A221950Number of nonisomorphic n-element left regular bands.at n=7A264899Lexicographically earliest sequence of positive integers a(1), a(2), a(3), ... such that for any n > 0, Sum_{k = 1..n} 1 / (k*a(k)) < 1.at n=6A374663