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 A309199 #8 Jul 25 2019 19:52:01 %S A309199 1,7,9,31,25,71,49,127,81,199,121,287,169,391,225,511,289,567,361,799, %T A309199 441,847,529,1151,625,1351,729,1567,841,1224,961,2047,1089,2311,1225, %U A309199 2591,1369,2887,845,3199,1681,3087,1849,3871,2025,3703,2209,4607,2401,4375 %N A309199 Index of n^2 in A111273. %C A309199 A111273(a(n)) = n^2. %C A309199 a(n) = A113658(n^2). - _Rémy Sigrist_, Jul 25 2019 %H A309199 Rémy Sigrist, <a href="/A309199/b309199.txt">Table of n, a(n) for n = 1..1000</a> %H A309199 Rémy Sigrist, <a href="/A309199/a309199.gp.txt">PARI program for A309199</a> %o A309199 (PARI) See Links section. %Y A309199 Cf. A111273, A113658. %K A309199 nonn %O A309199 1,2 %A A309199 _N. J. A. Sloane_, Jul 25 2019 %E A309199 More terms from _Rémy Sigrist_, Jul 25 2019