2928640

Appears in sequences

• Number of switching networks (see Harrison reference for precise definition).at n=2A000812
• arctan(arctan(x)*tan(x))=2/2!*x^2-80/6!*x^6-2688/8!*x^8+260608/10!*x^10...at n=6A012447
• tanh(arctan(x)*tan(x))=2/2!*x^2-80/6!*x^6-2688/8!*x^8+18688/10!*x^10...at n=5A012451
• Eighth unsigned column of Lanczos triangle A053125 (decreasing powers).at n=4A054326
• A transform of C(n,7).at n=9A082141
• Bisection of A002417.at n=31A100431
• a(n) = binomial(n+9, 9)*8^n.at n=4A196280
• a(n) is the number of subsets of {1..n} that contain exactly 4 odd numbers.at n=24A331419
• Triangle read by rows: T(n, k) = 2^(2*n)*JacobiP(n - k, k, -1/2 - n, -1).at n=41A380865