180865domain: NAppears in sequencesGreedy frac multiples of Pi^2/6: a(1)=1, Sum_{n>=1} frac(a(n)*x) = 1 at x = Pi^2/6.at n=13A079937Denominators of the convergents to the continued fraction of Pi^2/6.at n=12A080017Numbers of quasi-espalier polycubes of a given volume (number of atomic cells).at n=43A230118