6773760

Appears in sequences

• Sum of divisors of central binomial coefficient binomial(n, floor(n/2)).at n=23A064139
• Duplicate of A067819.at n=11A066972
• Sum of the divisors of binomial(2n,n).at n=11A067819
• Triangle read by rows: T(n,k) = 2^k * (n!/k!)*binomial(n-1,k-1).at n=40A086915
• Triangle: p(x) = (t/log(1 + t))^a0*(1 + t)^x; a0=2; weights (n+1)!*n!.at n=31A137381
• Number of 5-cycles in the n-halved cube graph.at n=8A290028
• Fourier coefficients of the modular form (1/t_{3A}) * sqrt(1 - 108/t_{3A}) * F_{3A}^10.at n=32A341555
• Triangle read by rows. T(n, k) = (-1)^(n-k)*(k+1)*binomial(n, k)*pochhammer(1-n, n-k).at n=48A360205
• Expansion of e.g.f. A(x,y) satisfying A(x,y) = 1 + x*A(x,y) * exp(x*y * A(x,y)), as a triangle read by rows.at n=38A366230
• Number of permutations of [n] having the maximal possible number of pairs of integers i<j in [n] such that their cycle minima have opposite sorting order.at n=23A381531
• Numbers k such that there exist three numbers x, y and z such that k = psi(x) = psi(y) = psi(z) = x + y + z.at n=21A387290