A163390 Numbers n such that n^3 can be represented as sum of (at least two) consecutive squares.
47, 65, 921, 2161, 2820, 12284, 13156, 16761, 18340, 43500, 61721, 63765, 64605, 66317, 99359, 116180, 122009, 146821, 159371, 260165, 269588, 314919, 403130, 524095, 690381, 813340, 827209, 869241, 985864, 1203015, 1348761, 1942084, 3145712, 3632486, 3867745
Offset: 1
Keywords
Examples
a(1) = 47 as 47^3 = 103823 = 22^2 + 23^2 + 24^2 + ... + 68^2.
Links
- Chai Wah Wu, Table of n, a(n) for n = 1..45
Formula
a(n)= (A136312(n))^(1/3). [R. J. Mathar, Aug 02 2009]
Extensions
a(6)-a(14) from Donovan Johnson, Feb 02 2011
a(15)-a(16) from Donovan Johnson, Jun 12 2011
a(17) from Donovan Johnson, Aug 02 2013
a(18)-a(35) from Chai Wah Wu, Jan 16 2016