1247103domain: NAppears in sequencesTriangle read by rows: the Y-transformation of the Catalan triangle A033184.at n=50A228335Numbers k such that k^2 is an odd primitive abundant number (A006038).at n=16A379950Numbers k such that k^2 is abundant but d*k is nonabundant for any proper divisor d of k.at n=25A381742