30411domain: NAppears in sequencesa(n)=Floor(n*2^(n/2)).at n=20A128441Partial sums of A160414.at n=31A161325Numbers k such that Sum_{d|k} sigma(d)^3/d is an integer, where d are the divisors of k.at n=11A226566Least number k = concat(x,y) such that k = n*x*y - x - y, -1 if such a number does not exist.at n=23A278935