621875

Appears in sequences

• Expansion of bracket function.at n=20A000750
• Scaled Chebyshev U-polynomial evaluated at sqrt(5)/2.at n=10A030191
• A convolution triangle of numbers generalizing Pascal's triangle A007318.at n=38A049326
• Binomial transform of Fibonacci(2n).at n=11A093131
• Expansion of ((1+x)^4-(1+x)x^3)/((1+x)^5-x^5).at n=22A105370
• a(n) = Sum_{k >= 0}(-1)^k*binomial(n,5*k).at n=23A289306
• a(n) = Sum_{k >= 0}(-1)^k*binomial(n,5*k).at n=24A289306
• a(n) = Sum_{k>=0} (-1)^k*binomial(n,5*k+3).at n=23A289388
• a(n) = Sum_{k>=0} (-1)^k*binomial(n,5*k+4).at n=24A289389