247940

Appears in sequences

• Exponentiation of g.f. for Fibonacci numbers.at n=10A006701
• Expansion of (3-2*x-3*x^2-4*x^3)/(1-3*x+x^2+x^3+x^4).at n=14A024876
• a(n) = gcd(Catalan(n), n!).at n=40A170829
• a(n) = binomial(2*n, n) / Product(p prime | n < p <= 2*n).at n=40A263931
• Convolution of nonzero squares (A000290) with nonzero pentagonal numbers (A000326).at n=20A271663
• Expansion of x*(1 + 2*x - 3*x^2 + 4*x^3) / (1 - x - x^2 + x^3 - x^4).at n=30A322753
• The number of vertices formed on a triangle with leg lengths equal to the Pythagorean triples by the straight line segments mutually connecting all vertices and all points that divide the sides into unit length parts.at n=8A333136