84000

Appears in sequences

• Number of 3-voter voting schemes with n linearly ranked choices.at n=38A007009
• Place n distinguishable balls in n boxes (in n^n ways); let f(n,k) = number of ways that max in any box is k, for 1 <= k <= n; sequence gives f(n,n-2)/n.at n=18A019579
• a(n) = n*(n - 1)^3/2.at n=21A019582
• a(n) = (2n)!*Sum_{i=1..n} 1/i.at n=3A046673
• Largest achievable determinant of a 4 X 4 matrix whose elements are the 16 consecutive integers n-15,...,n.at n=17A097696
• Triangle read by rows: T(n,k) is the number of labeled 2-connected planar graphs with n nodes and k edges, n >= 3, n <= k <= 3(n-2).at n=26A100960
• a(n) = n! * Sum_{k=1..floor(n/2)} 1/k.at n=7A101609
• n! * Sum[k=1..ceiling(n/2), 1/k].at n=7A101610
• Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k vertices of outdegree 2 (n >= 0, k >= 0).at n=21A120982
• Triangular array T(n,k) giving number of 2-connected graphs with n labeled nodes and k edges (n >= 3, n <= k <= n(n-1)/2).at n=36A123534
• Triangle A061356 read right to left.at n=48A139526
• Partition number array, called M31(4), related to A049352(n,m)= |S1(4;n,m)| (generalized Stirling triangle).at n=32A144354
• Numbers which are the area of exactly three Pythagorean triangles.at n=12A177021
• Numbers with prime factorization pqr^3s^5.at n=8A190475
• Numbers k such that the sum of prime factors of k (counted with multiplicity) equals five times the largest prime divisor of k.at n=35A212863
• Numbers n such that there are three distinct triples (k, k+n, k+2n) of squares.at n=5A222154
• Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=3A237489
• Number of (n+1)X(4+1) 0..3 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=0A237492
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=6A237494
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=9A237494