36647

Appears in sequences

• Numbers k such that the sum of the divisors of 2*k^2 is a square.at n=8A097023
• 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, 0), (-1, 0, 0), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.at n=9A149210
• G.f.: Sum_{n>=0} [Sum_{k=0..n} C(n,k)^2*x^k]^2 * x^n.at n=9A180717
• Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with three.at n=12A292169
• Number of compositions (ordered partitions) of n into distinct parts having a common factor > 1 with n.at n=42A332003
• Numbers that equal to the sum of their iterated absolute Möbius divisor function (A173557).at n=13A333873