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 A201919 #15 Mar 05 2020 11:48:19 %S A201919 0,1,7,8,49,148,344,2401,36016,151264,386561,1764736,5764801,46941952, %T A201919 58471553,374712065,1101076992,4802079233,15858967552,139825248256, %U A201919 149429406721,1595702681601,2453862488064,14602557997056,42091354378241,127990382747648 %N A201919 Automorphic numbers n^2 ends with n in base 14 (written in base 10). %H A201919 Eric M. Schmidt, <a href="/A201919/b201919.txt">Table of n, a(n) for n = 1..1000</a> %e A201919 a(3) = 7 = (7)_14 since 7^2 = 49 = (37)_14 ends with 7 in base 14. %e A201919 a(4) = 8 = (8)_14 since 8^2 = 64 = (48)_14 ends with 8 in base 14. %e A201919 a(5) = 49 = (37)_14 since 49^2 = 2401 = (C37)_14 ends with 37 in base 14. %o A201919 (Sage) # See A003226. - _Eric M. Schmidt_, Feb 09 2014 %Y A201919 Cf. A003226, A201821, A201918, A201921, A201948, A237583. %K A201919 nonn,base %O A201919 1,3 %A A201919 _Martin Renner_, Dec 06 2011 %E A201919 More terms from _Eric M. Schmidt_, Feb 09 2014