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 A137901 #12 Feb 27 2024 03:04:17 %S A137901 1,3,3,4,6,7,7,9,9,10,12,12,14,15,15,16,18,19,19,21,21,22,24,25,25,26, %T A137901 28,28,30,31,31,33,33,34,36,36,38,39,39,40,42,43,43,45,45,46,48,48,50, %U A137901 51,51,53,53,54,56,57,57,58,60,60,62,63,63,64,66,67,67,69,69,70 %N A137901 Limiting sequence when we start with positive integers (A000027) and at step n >= 1 add to the term at position n + a(n) the value 1. %F A137901 Limiting sequence when we start with positive integers (A000027) and at step n >= 1 add to the term at position n + a(n) the value 1. %o A137901 (PARI) lista(nn) = my(va = [1..nn]); for (n=1, nn, my(m = n+va[n]); if (m <= nn, va[m]++)); va; \\ _Michel Marcus_, Oct 29 2022 %Y A137901 Cf. A000027, A136119, A137319, A137417, A137418, A136259, A136272. %K A137901 easy,nonn %O A137901 1,2 %A A137901 _Ctibor O. Zizka_, Apr 30 2008 %E A137901 Entries corrected and extended by _Paolo P. Lava_, Mar 10 2009 %E A137901 More terms from _Michel Marcus_, Oct 29 2022