259444

Appears in sequences

• Number of upward triangles in a Star of David matchstick arrangement of size n.at n=37A045950
• a(1) = 1, a(2) = 1, a(n) = sum of tau(n) previous terms, where tau(n) is the number of divisors of n.at n=21A087549
• Number of nX5 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 1 vertically.at n=11A207679