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 A349896 #12 Jan 05 2022 15:32:22 %S A349896 0,9,6144,8850,63294,167460,1471350,17358894,19273044,90701559, %T A349896 153178644,189719685,197747394,2017743225,6233637435,59571334269, %U A349896 86021383575,156569713710,2073505928019,2889765691185,17962980751950,56300638961700,277087084821075,329363647943184 %N A349896 Record values in A349876. %o A349896 (PARI) f(n) = my(d=divrem(n, 3)); if (d[2], f(5*d[1]+d[2]+3), n); \\ A349876 %o A349896 lista(nn) = {my(r=0); for (n=1, nn, my(x = f(n)); if (x>r, print1(x, ", "); r=x););} \\ _Michel Marcus_, Dec 06 2021 %Y A349896 Cf. A349876. %K A349896 nonn,easy %O A349896 1,2 %A A349896 _Nicholas Drozd_, Dec 04 2021