1070100domain: NAppears in sequencesNumber of partitions of 5n such that cn(1,5) = cn(4,5) < cn(2,5) = cn(3,5) < cn(0,5).at n=21A036895Numbers k such that k and k^2 use only the digits 0, 1, 4, 5 and 7.at n=30A136856