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A290842 Numbers n such that sum of digits of n^3 is 3^3 = 27. 3
27, 33, 36, 39, 42, 54, 57, 69, 72, 75, 78, 84, 87, 93, 105, 108, 111, 114, 135, 138, 147, 162, 165, 168, 174, 177, 219, 222, 225, 228, 231, 234, 258, 267, 270, 273, 276, 285, 291, 294, 312, 318, 321, 330, 342, 345, 348, 351, 360, 369, 381, 384, 390, 405, 417 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

It is obvious that if n is in this sequence, then 10*n is. Additionally, this sequence contains another infinite subsequences. For example, 10^(2*n) + 10^n + 1 is in this sequence for all n > 0. - Altug Alkan, Aug 12 2017

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..500

EXAMPLE

27^3 = 19683, 1 + 9 + 6 + 8 + 3 = 27 = 3^3.

PROG

(PARI) isok(n) = sumdigits(n^3) == 27; \\ Altug Alkan, Aug 12 2017

CROSSREFS

Numbers n such that sum of digits of n^3 is k^3: A107679 (k=2), this sequence (k=3), A290843 (k=4), A159462 (k=5), A159463 (k=6).

Cf. A067075.

Sequence in context: A117934 A173136 A030134 * A024796 A025322 A151742

Adjacent sequences:  A290839 A290840 A290841 * A290843 A290844 A290845

KEYWORD

nonn,base

AUTHOR

Seiichi Manyama, Aug 12 2017

STATUS

approved

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Last modified September 21 19:59 EDT 2019. Contains 327282 sequences. (Running on oeis4.)