This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A290842 #34 Jul 15 2023 14:12:25 %S A290842 27,33,36,39,42,54,57,69,72,75,78,84,87,93,105,108,111,114,135,138, %T A290842 147,162,165,168,174,177,219,222,225,228,231,234,258,267,270,273,276, %U A290842 285,291,294,312,318,321,330,342,345,348,351,360,369,381,384,390,405,417 %N A290842 Numbers k such that the sum of digits of k^3 is 3^3 = 27. %C A290842 It is obvious that if k is in this sequence, then so is 10*k. Additionally, this sequence contains other infinite subsequences. For example, 10^(2*k) + 10^k + 1 is in this sequence for all k > 0. - _Altug Alkan_, Aug 12 2017 %H A290842 Seiichi Manyama, <a href="/A290842/b290842.txt">Table of n, a(n) for n = 1..500</a> %e A290842 27^3 = 19683, 1 + 9 + 6 + 8 + 3 = 27 = 3^3. %o A290842 (PARI) isok(n) = sumdigits(n^3) == 27; \\ _Altug Alkan_, Aug 12 2017 %Y A290842 Numbers k such that sum of digits of k^3 is m^3: A107679 (m=2), this sequence (m=3), A290843 (m=4), A159462 (m=5), A159463 (m=6). %Y A290842 Cf. A067075. %K A290842 nonn,base %O A290842 1,1 %A A290842 _Seiichi Manyama_, Aug 12 2017