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 A256364 #17 Feb 16 2025 08:33:25 %S A256364 274625,465125,528125,710645,912925,983125 %N A256364 Numbers that are multiple-digit narcissistic numbers in exactly five bases. %H A256364 W. Schneider, <a href="http://web.archive.org/web/20050213060737/http://www.wschnei.de/digit-related-numbers/pdi.html">Perfect Digital Invariants: Pluperfect Digital Invariants(PPDIs)</a> %H A256364 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/NarcissisticNumber.html">Narcissistic Number</a> %H A256364 Wikipedia, <a href="http://en.wikipedia.org/wiki/Narcissistic_number">Narcissistic number</a> %e A256364 a(1) = 274625 because this is the first number that is a multiple-digit narcissistic number in exactly five bases (528, 603, 1318, 1958 and 4217). %o A256364 (PARI) for(n=3, 1000000, k=0; for(z=2, n, y=n; j=0; L=List(); until(y==0, x=y%z; j++; listinsert(L, x, j); while(!((y%z)==0), y--); y=y/z); t=0; for(p=1, j, t+=L[p]^j); if(n==t, k++)); if(k==5, print1(n, ", "))) %Y A256364 Cf. A005188. %Y A256364 Cf. A256359 (every number of bases). %Y A256364 Cf. A256360, A256361, A256362, A256363, A256365 (1 to 4 and 6 bases). %Y A256364 Cf. A256459 (first occurrences). %K A256364 nonn,base,more %O A256364 1,1 %A A256364 _Tim Johannes Ohrtmann_, Mar 30 2015