85050

Appears in sequences

• a(n) = 225*(n-1)*(n-2)/2.at n=26A027470
• Hook products of all partitions of 12.at n=3A093791
• Hook products of all partitions of 12.at n=4A093791
• Triangle read by rows: T(n,k) is number of hex trees with n edges and k leaves (n >= 1, 1 <= k <= 1 + floor(n/2)).at n=32A126177
• Triangle read by rows: T(n,k) is number of hex trees with n edges and k vertices of outdegree 1 (0<=k<=n).at n=59A126178
• Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n having k DDU and LDU's.at n=34A128727
• Largest k such that k <= 81*(number of digits of k^n)*(number of digits of k^(n+1)).at n=5A130179
• Lower triangular array called S2hat(-3) related to partition number array A144279.at n=39A144280
• Triangle T(n, k) = S(n, k) + S(n, n-k), where S are the Stirling numbers (A048993) of the second kind, read by rows.at n=60A154844
• a(n) = 225*n^2 - 251*n + 70.at n=20A156810
• A triangle related to the GF(z) formulas of the rows of the ED3 array A167572.at n=22A167583
• Denominators of coefficients in Taylor series expansion of log(cotan(x)*arcsinh(x)) (even powers only).at n=5A202622
• Triangle read by rows: coefficients of harmonic-geometric polynomials.at n=31A222057
• Triangle read by rows: coefficients of harmonic-geometric polynomials.at n=40A222060
• Number of set partitions T'_t(n) of {1,2,...,t} into exactly n parts, with an even number of elements in each part distinguished by marks, and such that no part contains both 1 and t with 1 unmarked or both i and i+1 with i+1 unmarked for some i with 1 <= i < t; triangle T'_t(n), t>=0, 0<=n<=t, read by rows.at n=49A261318
• a(n) = min {i - j} where i*j is a factorization of the n-th partial product of the semiprimes (A112141).at n=12A317490
• The number of ways of seating n people around a table for the second time so that k pairs are maintained. T(n,k) read by rows.at n=48A326390
• E.g.f.: 1 / ((1 + x) * sqrt(1 - 2*x)).at n=7A331403