370440

Appears in sequences

• Triangle of coefficients of n!*(1 - x)^n*L_n(x/(1 - x)), where L_n(x) is the Laguerre polynomial.at n=30A123202
• Numbers with at least three 3s in their prime signature.at n=7A176359
• Numbers which are the area of exactly three Pythagorean triangles.at n=30A177021
• Triangular array read by rows. T(n,k) is the number of digraphs with n labeled nodes having exactly k undirected (or weak) components, n >= 1, 1 <= k <= n.at n=32A189898
• a(n) = 7*a(n-1) -14*a(n-2) +7*a(n-3), with a(0)=1, a(1)=2, a(2)=7.at n=10A215143
• Numbers m such that, in the prime factorization of m, the product of the exponents equals the sum of prime factors and exponents.at n=33A231231
• Numbers n such that psi(n) and sigma(n) both are perfect squares and n is not a squarefree number.at n=0A291638
• Triangular array read by rows. T(n,k) is the number of closed walks of length 2n along the edges of a cube based at vertex v that return to v exactly k times, n>=0, 0<=k<=n.at n=30A336667
• Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(k^3).at n=41A343283
• Dirichlet g.f.: Product_{k>=2} (1 + k^(-s))^(k^3).at n=41A343323
• Numbers that have exactly three exponents in their prime factorization that are equal to 3.at n=7A386802
• Numbers k with squarefree kernel 210 such that both k-1 and k+1 are prime.at n=26A392030