175273

Appears in sequences

• Positive numbers y such that y^2 is of the form x^2+(x+16807)^2 with integer x.at n=21A156713
• Pairs of nodes in a complete binary tree that are at an absolute height difference of less than 2 from each other.at n=8A251743
• a(0) = a(1) = a(2) = 1, for n > 2, a(n) = a(n-1) + a(n-k) + k with k = 2.at n=30A362255