551880

Appears in sequences

• a(n) = n^4 + n^3 + n^2 + n.at n=27A027445
• Coefficients in q-expansion of (E_2*E_4 - E_6)/720, where E_2, E_4, E_6 are the Eisenstein series shown in A006352, A004009, A013973, respectively.at n=27A281372
• Numbers k such that k = Sum_{i=1..j} Sd(k)^i, for some j>0, where Sd(k) is the sum of the digits of k.at n=27A286126
• Product of first n terms of continued fraction expansion of Pi.at n=10A331583
• Product of first n terms of continued fraction expansion of Pi.at n=11A331583
• a(n) = Sum_{d|n} n^tau(d).at n=26A345271