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A197039 Numbers such that sum of the cube of decimal digits is a perfect square. 5
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

EXAMPLE

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

MATHEMATICA

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

CROSSREFS

Cf. A028839, A175396.

Sequence in context: A283320 A086390 A038029 * A020672 A028837 A178241

Adjacent sequences:  A197036 A197037 A197038 * A197040 A197041 A197042

KEYWORD

nonn,base

AUTHOR

Michel Lagneau, Oct 08 2011

STATUS

approved

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Last modified October 23 09:28 EDT 2019. Contains 328345 sequences. (Running on oeis4.)