1570800

Appears in sequences

• Seventh column of Catalan triangle A009766.at n=24A064059
• a(n) = binomial(6*n,n)*(4*n+1)/(5*n+1).at n=6A215542
• Number of standard Young tableaux of shape [6n,6].at n=5A215546
• Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have a' * b' = k, where a' and b' are the arithmetic derivatives of a and b.at n=29A259675
• Number of steps of iterating 0 under z^2 + c before escaping, i.e., abs(z^2 + c) > 2, with c = -5/4 - epsilon^2 + epsilon*i, where epsilon = 10^(-n) and i^2 = -1.at n=6A300078
• Determinant of n X n matrix whose main diagonal consists of the first n 5-gonal numbers and all other elements are 1's.at n=5A302909
• Numbers k such that k*A003557(A003961(k)) divides A353790(k), where A353790(n) = phi(A003973(n)) * A064989(A003973(n)).at n=37A353797
• a(n) = Product_{d|n, d>1} (d - 1).at n=35A377484