14745600

Appears in sequences

• Successive numerators of Wallis's approximation to Pi/2 (unreduced).at n=10A001900
• Central factorial numbers: a(n) = 4^n * (n!)^2.at n=5A002454
• Expansion of (x-1)*(x^2-4*x-1)/(1-2*x)^2.at n=19A003232
• Least m with n*(n+1)/2 divisors.at n=16A081620
• Triangle T(n,k) defined by the generating function cosh(sqrt(y)*arcsin(x)) + sqrt(y)*sinh(sqrt(y)*arcsin(x)) - 1 = Sum_{n>=1} Sum_{k=1..n} T(n,k)*y^k *x^n/n!.at n=36A091885
• Triangle T(n,k) defined by the generating function: exp(y*arcsin(x))-1 = Sum_{n>=1} (Sum_{k=1..n} T(n,k)*y^k)*x^n/n!.at n=67A121408
• a(n) = n^2*(n-2)^2*(n-4)^2*...*(1 or 2)^2.at n=10A184877
• Smallest number having exactly t divisors, where t is the n-th triprime (A014612).at n=34A185445
• Number of ways to place n nonattacking bishops on an n X n toroidal board.at n=9A189790
• Cyclic quadrilateral numbers: numbers m = a*b*c*d such that the integers a,b,c,d are the sides of a cyclic quadrilateral whose area and circumradius are integers.at n=24A218431
• Number of (n+2)X(1+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum.at n=7A256764
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum.at n=28A256771
• Expansion of x^3*(3*x - 2)/(2*x - 1)^3.at n=20A268586
• a(n) is the least number with exactly n noninfinitary square divisors.at n=28A358262
• Integers k such that A008472(k) / A001222(k) = 1/2.at n=27A390139