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 A229544 #24 Aug 24 2025 11:34:57 %S A229544 1,8,243,784,7776,9826,13122,24389,26244,39366,47628,55566,59895, %T A229544 71442,82944,122825,124416,226981,263424,275625,316368,323433,333396, %U A229544 588245,663255,774144,843648,1339893,1492992,1613472,2341344,3816336,3981312,8719893,8992364,9393931,9927988,11212884,11239424,14823774 %N A229544 Numbers k such that k*product_of_digits(k) is a nonzero cube. %e A229544 7776*(7*7*7*6) = 1600030008 = 252^3. Thus, 7776 is a member of this sequence. %o A229544 (PARI) isok(k) = my(p=vecprod(digits(k))); p && ispower(k*p, 3); \\ _Michel Marcus_, Aug 24 2025 %Y A229544 Cf. A066565, A098736. %K A229544 nonn,base,changed %O A229544 1,2 %A A229544 _Derek Orr_, Sep 25 2013 %E A229544 Corrected and extended by _Derek Orr_, Mar 22 2015