281250

Appears in sequences

• Numbers n that are the hypotenuse of exactly 6 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 6 ways.at n=12A097219
• Number of terms in A095810 which have n digits.at n=7A113023
• a(n) = 5^n*Lucas(n), where Lucas = A000204.at n=5A127212
• Averages of twin prime pairs k such that k*2 and k/2 are squares.at n=19A154670
• a(n) = n^6*(n+1)^2/2.at n=5A163276
• Numbers k such that phi(sigma(k))/sigma(phi(k)) = 2.at n=16A229238
• Number of nonisomorphic proper colorings of partition star graph using six colors.at n=35A297570
• Number of nonisomorphic proper colorings of partition star graph using six colors.at n=41A297570
• Numbers k that are a substring of k*(k-1).at n=32A316263
• a(n) = Product_{d|n} A276086(d)^A010051(n/d).at n=41A329350
• Numbers k that set records in A355432.at n=37A360589
• a(n) = Product_{d|n} A276086(d)^A349394(n/d).at n=41A380459
• Numbers m of the form 2^i * 3^j * 5^k such that i, j, k > 0 and m+1 and m-1 are both prime numbers.at n=20A386252