45096

Appears in sequences

• Triangle read by rows: T(n,k) is the number of permutations of [n] with k alternating runs (n>=2, k>=1).at n=31A059427
• Number of permutations of [n] with 4 sequences.at n=9A060158
• Number of line segments connecting exactly 5 points in an n x n grid of points.at n=38A177721
• a(0) = 1; a(n+1) is the smallest number not in the sequence such that a(n+1) - Sum_{i=1..n} a(i) divides a(n+1) - Product_{i=1..n} a(i).at n=24A254343
• Number of self-conjugate inseparable solutions of X + Y = 2Z (integer, disjoint triples from {1,2,3,...,3n}).at n=12A279197