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 A050241 #27 Feb 16 2025 08:32:40 %S A050241 224,226,264,332,334,375,377,445,935,994,1323,1676,2062,2132,2133, %T A050241 2139,2205,2240,2241,2246,2247,2248,2249,2353,2356,2373,2376,2394, %U A050241 2407,2423,2445,2449,2464,2532,2536,2572,2577,2623,2626,2627,2628,2757,2773,2792,2793 %N A050241 Handsome numbers (A007532) representable in exactly two distinct ways (counting different powers of duplicated digits as distinct). %H A050241 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PowerfulNumber.html">Powerful Number</a>. %H A050241 <a href="/index/Pow#powerful">Index entries for sequences related to powerful numbers</a> %e A050241 From _Sean A. Irvine_, Aug 10 2021: (Start) %e A050241 24 is not a term because 24 = 2^3 + 4^2 has only one representation. %e A050241 224 is a term because 224 = 2^7 + 2^5 + 4^3 = 2^5 + 2^7 + 4^3. %e A050241 333 is not a term because 333 = 3^5 + 3^4 + 3^2 = 3^5 + 3^2 + 3^4 = 3^4 + 3^5 + 3^2 = ... has more than 2 representations. (End) %Y A050241 Cf. A007532, A050240. %K A050241 nonn,base %O A050241 1,1 %A A050241 _Eric W. Weisstein_ %E A050241 Name made more precise and missing terms inserted by _Sean A. Irvine_, Aug 10 2021 %E A050241 Name clarified by _David J. Seal_, Aug 18 2021