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 A387089 #6 Aug 16 2025 10:03:42 %S A387089 2,3,3,3,5,5,5,5,5,5,5,5,5,5,5,5,11,11,11,11,11,11,11,13,13,13,13,13, %T A387089 13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,17,17,17,17,17,17,17,17, %U A387089 23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23 %N A387089 Smallest number missing in the sequence A386482 after n terms. %H A387089 Rémy Sigrist, <a href="/A387089/b387089.txt">Table of n, a(n) for n = 1..10000</a> %H A387089 Rémy Sigrist, <a href="/A387089/a387089.gp.txt">PARI program</a> %e A387089 The first terms, alongside the first terms of A386482, are: %e A387089 n a(n) A386482(n) %e A387089 -- ---- ---------- %e A387089 1 2 1 %e A387089 2 3 2 %e A387089 3 3 4 %e A387089 4 3 6 %e A387089 5 5 3 %e A387089 6 5 9 %e A387089 7 5 12 %e A387089 8 5 10 %e A387089 9 5 8 %e A387089 10 5 14 %e A387089 11 5 7 %e A387089 12 5 21 %e A387089 13 5 18 %e A387089 14 5 16 %e A387089 15 5 20 %e A387089 16 5 15 %e A387089 17 11 5 %o A387089 (PARI) \\ See Links section. %Y A387089 Cf. A137847, A386482. %K A387089 nonn %O A387089 1,1 %A A387089 _Rémy Sigrist_, Aug 16 2025