A197039 Numbers such that sum of the cube of decimal digits is a perfect square.

1, 4, 9, 10, 12, 21, 22, 40, 48, 84, 88, 90, 100, 102, 120, 123, 126, 132, 162, 168, 186, 201, 202, 210, 213, 216, 220, 231, 261, 312, 321, 333, 400, 408, 480, 612, 618, 621, 681, 804, 808, 816, 840, 861, 880, 900, 1000, 1002, 1020, 1023, 1026, 1032, 1062

Offset: 1

Author

Michel Lagneau, Oct 08 2011

Keywords

• nonn
• base

Examples

			261 is in the sequence because 2^3+6^3+1^3 = 15^2.
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A028839, A175396.

Programs

Mathematica

Select[Range[1100],IntegerQ[Sqrt[Apply[Plus,IntegerDigits[#]^3]]]&]