A180244 Numbers whose square can be expressed as the sum of a square, a cube and a fourth power of three different numbers.
5, 8, 9, 12, 17, 19, 21, 22, 23, 25, 28, 31, 32, 33, 35, 37, 38, 39, 42, 44, 45, 46, 47, 51, 52, 53, 54, 55, 57, 59, 60, 61, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 77, 78, 79, 80, 81, 82, 83, 84, 85, 87, 88, 89, 90, 91, 93, 95, 96, 97, 98, 99, 100, 101, 103, 105, 107
Offset: 1
Keywords
Examples
a(5)=17 since 17^2 = 289 = 5^2+2^3+4^4 = 12^2+4^3+3^4; (5,2,4) and (12,4,3) are all different. [Corrected by _Bruno Berselli_, Aug 25 2010]
Comments