1590121

Appears in sequences

• Squares expressible as the sum of two positive cubes in at least one way.at n=25A050802
• a(n) = n^4 - 2*n^3 + 3*n^2 - 2*n + 1, the Alexander polynomial for reef and granny knots.at n=36A058031
• Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.at n=9A207601
• Powerful numbers (A001694) which can be written as the sum of two relatively prime 3-powerful numbers (A036966) different from 1.at n=25A210470
• Powerful numbers of the form x^3 + y^3 with x and y coprime.at n=8A238120
• Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have (a+b)^2 = k.at n=33A258844
• Perfect powers of the form x^3 + y^3 where x and y are positive integers.at n=30A267088
• Perfect powers of the form x^3 + y^3 where x and y are distinct positive integers.at n=21A267416