450340

Appears in sequences

• Number of rooted noncrossing trees with n nodes such that root has degree 1 and the child of the root has degree at least 2.at n=8A030983
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.at n=10A150210
• Lesser of a pair of amicable numbers k < m such that s(k) = m and s(m) = k, where s(k) = A380845(k) - k is the sum of aliquot divisors of k that have the same binary weight as k.at n=5A380849