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 A073219 #8 Jul 27 2021 05:01:56 %S A073219 1,6,11,61,66,121,666,671,726,1331,7321,7326,7381,7986,14641,80526, %T A073219 80531,80586,81191,87846,161051,885781,885786,885841,886446,893101, %U A073219 966306,1771561,9743586,9743591,9743646,9744251,9750906,9824111,10629366,19487171 %N A073219 The terms of A073211 (sums of two powers of 11) divided by 2. %F A073219 T(n,m) = (11^n + 11^m) / 2, n = 0, 1, 2, 3 ..., m = 0, 1, 2, 3, ... n. %e A073219 a(4) = 61 = (11^2+11^0) / 2. %Y A073219 Cf. A073211. %K A073219 nonn,easy,tabl %O A073219 1,2 %A A073219 _Jeremy Gardiner_, Jul 21 2002