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 A308248 #11 Aug 10 2019 23:23:23 %S A308248 0,1,9,16,81,784,6561,18496,1478656,43046721,281165824,893352321, %T A308248 5859137025,41368305664,405026597889,1088266240000,15965210931201, %U A308248 36991307874304,583272781383681,1318789102698496 %N A308248 Squares of automorphic numbers in base 6 (cf. A237583). %F A308248 a(n) = A237583(n)^2. - _Michel Marcus_, May 17 2019 %e A308248 784 = 3344_6 and sqrt(3344_6) = 44_6. Hence 784 is in the sequence. %o A308248 (Sage) [(n * n) for n in (0..1000000) if (n * n).str(base = 6).endswith(n.str(base = 6))] %Y A308248 Cf. A237583. %K A308248 nonn,base %O A308248 1,3 %A A308248 _Jeremias M. Gomes_, May 17 2019