26264

Appears in sequences

• a(n) = 10*n^3 - 6*n^2.at n=14A006592
• Triangle of coefficients, read by rows, where the n-th row forms the polynomial P(n,x) = {Sum_{k=1..n} 1/(k+x)}*{Product_{k=1..n} (k+x)}.at n=22A074246
• Triangle of coefficients, read by rows of (2n+1) terms, where the n-th row forms a polynomial in x, P(n,x), of degree 2n and satisfies: P(n,x) = [Sum_{k=1..n} 1/(k + x + x^2)]*[Product_{k=1..n} (k + x + x^2)].at n=37A074248
• Number of perfect rulers with n segments (n>=0).at n=12A103301
• Numbers whose anti-divisors sum to a perfect cube.at n=30A109351
• Triangle of coefficients arising from an expansion of Integral( exp(exp(exp(x))), dx).at n=30A188881
• Number of n X 1 1..2 arrays with every element value z a city block distance of exactly z from another element value z.at n=28A209603
• Number of intersections of diagonals in the exterior of a regular n-gon.at n=25A211382
• Triangular array read by rows. T(n,k) is the number of labeled relations on n elements with exactly k vertices of indegree and outdegree = 0.at n=41A217436
• Number of hybrid 9-ary trees with n internal nodes.at n=4A245052
• Numbers k such that 6 is the smallest decimal digit of k^2.at n=17A291631
• G.f.: Sum_{k>=1} x^k/(1+x^k) * Product_{k>=1} (1+x^k)/(1-x^k).at n=22A305101
• Numbers k such that k and k+1 are both phi-practical numbers (A260653).at n=30A330871
• Number of words of length n, over the alphabet {a,b,c}, which have an odd number of a's and the number of b's plus the number of c's is less than or equal to 3.at n=28A342159
• Triangle read by rows, T(n, k) = (-1)^(n-k)*Bell(k)*Stirling1(n+1, k+1), for 0 <= k <= n.at n=30A355266