29904

Appears in sequences

• (prime(n-1) + 1)*(prime(n+1) - 1).at n=38A087105
• T(n,k) is the number of partial bijections (or subpermutations) of an n-element set of height k (height(alpha) = |Im(alpha)|) and without fixed points.at n=48A144089
• Triangle read by rows: number of meanders filling out an n X k grid, unreduced for symmetry.at n=25A201145
• Number of (n+2)X(6+2) 0..3 arrays with every consecutive three elements in every row and column not having exactly two distinct values, and in every diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=19A253023
• Irregular triangle read by rows: T(n,m) = number of lattice paths of type B^Q terminating at point (n, m).at n=58A291087
• Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^4.at n=29A341243
• Number of integer partitions of n of which every permutation has a consecutive monotone triple, i.e., a triple (..., x, y, z, ...) such that either x <= y <= z or x >= y >= z.at n=46A344654
• Integers k such that there exists an integer 0<m<k such that (1/sigma(m)^2 + 1/sigma(k)^2)*(m+k)^2 = 1.at n=9A383964