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 A364890 #24 Feb 18 2024 23:36:38 %S A364890 1,2,49,14,80,44,529983,104,16640,2511,8212890624,735,1019423412224, %T A364890 29888,600624,2295,54020648488730624,6075,3018417549254328320,5264, %U A364890 123200,24151040,3264402128528250685620224,5984,1753599375,689278976,2310399,156735,27965083137654166225393025024,180224,11404289746101879774056466612224,21735,170853262335,2035980763136,207593229375,223244 %N A364890 Least number k such that A060778(k) = n. %o A364890 (PARI) a(n) = my(x=1, nx=1, ny=2); while(gcd(nx, ny) != n, x++; nx=ny; ny=numdiv(x+1)); x; %Y A364890 Cf. A000005, A058074, A060778, A084307, A364903. %K A364890 nonn %O A364890 1,2 %A A364890 _Seiichi Manyama_, Aug 12 2023 %E A364890 a(11),a(13),a(17),a(19),a(23)-a(36) from _Max Alekseyev_, Feb 18 2024