57750

Appears in sequences

• Denominators of Van der Pol numbers.at n=8A003163
• 10-gonal (or decagonal) pyramidal numbers: a(n) = n*(n + 1)*(8*n - 5)/6.at n=35A007585
• Even hexagonal pyramidal numbers.at n=21A015226
• Second diagonal of A027446.at n=11A027449
• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-1)/3.at n=35A048013
• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-2)/3.at n=35A048024
• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-3)/3.at n=35A048035
• Triangle where T(n,k) = -n!/(n-k)!*[x^k] ( x/log(1-x-x^2) )^(n+1), for n>=k>=0, read by rows.at n=31A118793
• Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k UU's (doublerises) (n >= 1; 0 <= k <= n-1).at n=59A128718
• Denominators of Blandin-Diaz compositional Bernoulli numbers (B^sin)_3,n.at n=4A132093
• Partition number array, called M32(-5), related to A013988(n,m)= |S2(-5;n,m)| ( generalized Stirling triangle).at n=38A144268
• Numbers with exactly 5 distinct prime divisors {2,3,5,7,11}.at n=20A147572
• Table read by rows of numbers of unordered pairs of partitions of n-element set that have Rand distance k (n>=2, 1 <= k <= n(n-1)/2).at n=42A192100
• Even, nonzero decagonal pyramidal numbers.at n=16A218331
• Number of inequivalent (mod D_4) ways to place 2 nonattacking knights on an n X n board.at n=29A243717
• Number of (undirected) Hamiltonian paths in the n-dipyramidal graph.at n=18A307939
• Numbers n for which 2 < A257993(A276086(A276086(n))) < A257993(n), where A276086 converts the primorial base expansion of n into its prime product form, and A257993 returns the index of the least prime not present in its argument.at n=38A328762
• a(n) = Product_{d|n, d>1} A000040(A297113(d)), where A000040(n) gives the n-th prime, and A297113(n) = the excess of n plus the index of the largest dividing prime (A046660 + A061395).at n=39A332461
• Primitive terms of A051487.at n=26A346694