1061565domain: NAppears in sequencesExpansion of e.g.f. 1 / (1 - x)^cosh(x).at n=9A351881Numbers k such that k^2 is an odd primitive abundant number (A006038).at n=12A379950Numbers k such that k^2 is abundant but d*k is nonabundant for any proper divisor d of k.at n=21A381742