453600

Appears in sequences

• Denominators of coefficients for repeated integration.at n=7A002689
• Expansion of e.g.f. arctan(log(x+1) - sin(x)).at n=10A013213
• Number of permutations of an n-set containing an 8-cycle.at n=10A029575
• Expansion of e.g.f. (1 - 2*x*sqrt(1-4*x))*(1 - sqrt(1-4*x))/4.at n=7A052719
• a(0) = a(1) = a(2) = 0; a(n) = n!/(n-2) for n > 2.at n=10A052747
• Consider the solutions to k = a+b = x*y and a*b = k*(x+y) where k, a, b, x, and y are all positive integers, ordered by increasing k and, in case of ties, by increasing x. Sequence gives values of a*b.at n=21A057421
• Number of 1-connected claw-free cubic graphs with 2n nodes.at n=4A057848
• Triangle n!/(n-k), 1 <= k < n, read by rows.at n=37A058298
• Number of 2-connected claw-free labeled cubic graphs with 2n nodes.at n=4A058929
• Number of degree-n permutations of order exactly 8.at n=9A061122
• a(n) = denominator(b(n)), where b(1) = b(2) = 1, b(n) = (b(n-1) + b(n-2))/(n-1).at n=10A069944
• Triangle whose n-th row contains the n smallest numbers that are products of n distinct integers > 1, read by rows.at n=31A081957
• Triangle, read by rows, that equals the matrix inverse of A071207 when treated as a lower triangular matrix.at n=61A089962
• Triangle read by rows: T(n,k) is the number of permutations p of [n] in which exactly the first k terms satisfy the up-down property, i.e., p(1)<p(2), p(2)>p(3), p(3)<p(4), ...at n=47A092580
• Triangle read by rows: T(n,k) is the number of permutations p of [n] having length of first run equal to k.at n=47A092582
• Least product of the parts of the partitions of n where that product has the maximum number of divisors.at n=39A092991
• In the triangle shown below the n-th row contains n rational numbers n/1, {n*(n-1)}/{n +(n-1)}, {(n)*(n-1)*(n-2)}/{n +(n-1)+(n-2)}, ..., the last term being 2*(n-1)!/(n+1). Sequence gives the numerators in each row.at n=52A093422
• Triangle read by rows: T(n,k) is the number of permutations p of [n] in which the length of the longest initial segment avoiding the 123-, the 132- and the 231-pattern is equal to k.at n=48A094112
• Triangle read by rows: T(n,k), the k-th term of the n-th row, is the product of all numbers from 1 to n except k: T(n,k) = n!/k.at n=52A094310
• Even triangle !n. This table read by rows gives the coefficients of sum formulas of n-th Left factorials (A003422). The k-th row (6>=k>=1) contains T(i,k) for i=1 to k+2, where k=[2*n+1+(-1)^(n-1)]/4 and T(i,k) satisfies !n = Sum_{i=1..k+2} T(i,k) * n^(i-1) / (2*k-2)!.at n=32A102411