1221025

Appears in sequences

• Smallest number that is the sum of 2 squares (allowing zeros) in exactly n ways.at n=13A000446
• Crystal ball sequence for D_4 lattice.at n=23A007204
• Least positive integer that is the sum of two squares of positive integers in exactly n ways.at n=12A016032
• Smallest k such that circle x^2 + y^2 = k passes through exactly 4n integer points.at n=26A018782
• Numbers of the form q1^b1 * q2^b2 * q3^b3 * q4^b4 * q5^b5 * ... where q1=5, q2=13, q3=17, q4=29, q5=37, ... (A002144) and b1 >= b2 >= b3 >= b4 >= b5 >= ....at n=32A054994
• Least number which is the sum of two distinct nonzero squares in exactly n ways.at n=12A093195
• Smallest strictly positive number decomposable in n different ways as a sum of two squares.at n=13A124980
• Nonnegative integers c such that there are nonnegative integers a and b that satisfy a^(1/2) + b^(1/2) = c^(1/2) and a^2 + b = c.at n=13A135509
• Irregular triangle in which row n has the values of k>1 such that sum_{i=n..n+k-1} i^2 is a square.at n=21A184885
• Least perfect power that is the sum of two nonzero squares in exactly n ways.at n=12A273279
• 1/15840 of the volume of a primitive 3-simplex.at n=20A295507
• a(n) is the smallest nonnegative integer k where exactly n ordered pairs of positive integers (x, y) exist such that x^2 + y^2 = k.at n=26A328151
• Let n = p_1*p_2*...*p_k be the prime factorization of n, with the primes sorted in descending order. Then a(n) = 5^(p_1 - 1)*13^(p_2 - 1)*17^(p_3 - 1)*...*A002144(k)^(p_k - 1).at n=26A340388
• Numbers k such that (65*k)^2 can be represented in exactly 4 ways as the sum of a positive square and a positive fourth power.at n=21A346594
• Numerator of squared radius of smallest circle passing through exactly n integral points.at n=11A353700
• Numerator of squared radius of smallest circle passing through exactly n integral points.at n=25A353700