358080

Appears in sequences

• cos(arctan(x)*arcsin(x))=1-12/4!*x^4+120/6!*x^6-7728/8!*x^8...at n=5A012436
• Number of n-digit binary strings such that for all 2 <= k <= n, the string formed by the first k digits of the original string is composed of at least one-quarter 1's and one-quarter 0's.at n=20A268691
• a(n) = Sum_{k=0..floor(n/2)} 2^k * binomial(k,n-2*k)^2.at n=18A387476