105413domain: NAppears in sequencesGreedy frac multiples of 1/Pi: a(1)=1, Sum_{n>0} frac(a(n)*x) = 1 at x=1/Pi, where "frac(y)" denotes the fractional part of y.at n=33A080142Numbers whose square starts with 5 identical digits.at n=9A119866a(n) = 2*n^3 + 3*n^2.at n=37A275709