257257

Appears in sequences

• Number of distinct lines through the origin in the n-dimensional lattice of side length 7.at n=6A090023
• Number of distinct lines through the origin in 6-dimensional cube of side length n.at n=7A090028
• Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n, having k long ascents (i.e., ascents of length at least 2). Rows are of length 1,1,2,2,3,3,... .at n=53A091156