61020

Appears in sequences

• McKay-Thompson series of class 18B for the Monster group.at n=25A058532
• McKay-Thompson series of class 18B for the Monster group with a(0) = 2.at n=25A215407
• McKay-Thompson series of class 18B for the Monster group with a(0) = 5.at n=25A215660
• Number of terms in the cycle index Z(S_n X S_n) of the Cartesian product of the symmetric group S_n with itself that contain q cycles, where 1 <= q <= n*n. (Triangular array.)at n=64A279514
• Exponential (2,4)-perfect numbers: numbers m such that esigma(esigma(m)) = 4m, where esigma(m) is the sum of exponential divisors of m (A051377).at n=29A328133
• Dirichlet inverse of function f(n) = 1+(A003415(n)*A276086(n)), where A003415 is the arithmetic derivative and A276086 is the primorial base exp-function.at n=41A359603
• Diagonal of rational function 1/(1 - (1 + x*y*z) * (x^3 + y^3 + z^3)).at n=11A361730