130645

Appears in sequences

• Numbers k that are the hypotenuse of exactly 40 distinct integer-sided right triangles, i.e., k^2 can be written as a sum of two squares in 40 ways.at n=27A097282
• 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, -1), (0, -1, 0), (1, -1, -1), (1, 1, 1)}.at n=10A149508
• Numbers n that are the product of four distinct odd primes and x^2 + y^2 = n has integer solutions.at n=20A264499
• a(n) = n^4 + 324.at n=19A272298
• Negated inverse Euler transform of {-1 if n is a triangular number else 0, n > 0} = -A010054.at n=35A320784