121200

Appears in sequences

• Conjectured number of irreducible multiple zeta values of depth 10 and weight 2n+28.at n=16A022498
• Digitally balanced numbers: ternary numbers which have the same number of 0's as 1's as 2's.at n=30A181986
• 8-digit numbers (padded with leading zeros where necessary) in which the sum of the number consisting of the first four digits and the number consisting of the last four digits equals the number consisting of the middle four digits.at n=24A293686
• Constant term in the expansion of (-1 + Product_{k=1..n} (1 + x_k + 1/x_k))^n.at n=4A326920
• Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(n,k) is the constant term in the expansion of (-1 + Product_{j=1..n} (1 + x_j + 1/x_j))^k.at n=40A327751
• Constant term in the expansion of (-1 + (1 + w + 1/w) * (1 + x + 1/x) * (1 + y + 1/y) * (1 + z + 1/z))^n.at n=4A328875
• Triangular array, read by rows: T(n,k) = [(w*x*y*z)^k] (-1 + (1 + w + 1/w)*(1 + x + 1/x)*(1 + y + 1/y)*(1 + z + 1/z))^n for -n <= k <= n.at n=20A329820
• Even numbers k such that the sum of divisors of k in Gaussian integers is a real number.at n=6A332532