98178

Appears in sequences

• Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k ascents of length 2.at n=49A102402
• Number of Dyck paths of semilength n having no ascents of length 2.at n=13A102403
• Elements of A011185 that are also the sum of a pair of distinct elements of A011185.at n=27A133605
• Start with an equilateral triangle, and repeatedly append along the triangles of the previous step equilateral triangles with half their side length that do not overlap with any prior triangle; a(n) gives the number of triangles appended at n-th step.at n=13A321257