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 A048545 #23 Feb 16 2025 08:32:40 %S A048545 13,113,886,2861,9213,93855,298053,1359738,2967970,26189480,220183761, %T A048545 433461519,3462498821,28962801813,43462498821,722411301260, %U A048545 942809540088,9049247973113,29354537778480,195230348268113,1970200215432144,2426703296418144,2233582298883761,93802389568778480,242669917148548480 %N A048545 a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 8's. %H A048545 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PronicNumber.html">Pronic Number</a> %e A048545 From _Jesse Sealand_, Oct 07 2019: (Start) %e A048545 a(1) = 13 since A002378(13) = 182; %e A048545 a(2) = 113 since A002378(113) = 12882; %e A048545 a(3) = 886 since A002378(886) = 785882; %e A048545 a(4) = 2861 since A002378(2861) = 8188182, etc. %e A048545 (End). %Y A048545 Cf. A048546, A002378. %Y A048545 Cf. A048529, A048531, A048533, A048535, A048537, A048539, A048541, A048543, A048547. %K A048545 nonn,base %O A048545 1,1 %A A048545 _Patrick De Geest_, May 15 1999 %E A048545 a(13)-a(16) from _Lars Blomberg_, Jun 10 2011 %E A048545 Name edited by _Jesse Sealand_, Oct 07 2019 %E A048545 a(17) from _Giovanni Resta_, Oct 09 2019 %E A048545 a(18)-a(25) from _Max Alekseyev_, Jul 25 2024