581042

Appears in sequences

• Numbers k such that the number of divisors of k equals the number of anti-divisors of k.at n=29A073694
• Square array read by antidiagonals upwards: T(i,j), i, j >= 1, is the smallest number m such that the symmetric presentation of sigma, SRS(m), has maximum width 3, consists of 2*i-1 parts and has 2*j-1 occurrences of maximum width 3 in its width pattern (row m of A341969).at n=7A377668