366912

Appears in sequences

• Theta series of lattice A_2 tensor E_6 (dimension 12, det. 6561, min. norm 4).at n=9A033698
• Numbers m with a divisor d such that tau(d) * sigma(d) = m.at n=25A331668
• a(n) is the total number of down-steps after the final up-step in all 3-Dyck paths of length 4*n (n up-steps and 3*n down-steps).at n=7A334682
• Number of pairs of 2 X 2 matrices (X,Y) over Z/nZ such that X*Y = 0 and Y*X <> 0.at n=12A338099
• Coreful triperfect numbers: numbers k such that csigma(k) = 3*k, where csigma(k) is the sum of the coreful divisors of k (A057723).at n=29A364990