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 A294773 #15 Oct 04 2023 03:51:15
%S A294773 1,33,2188,262273,48828126,13060753578,4747561509944,2251799880796161,
%T A294773 1350851717674586413,1000000000152587898818,895430243255237372246532,
%U A294773 953962166441299506564257602,1192533292512492016559195008118
%N A294773 a(n) = Sum_{d|n} d^(d+n+1).
%H A294773 Seiichi Manyama, <a href="/A294773/b294773.txt">Table of n, a(n) for n = 1..214</a>
%t A294773 a[n_] := DivisorSum[n, #^(# + n + 1) &]; Array[a, 13] (* _Amiram Eldar_, Oct 04 2023 *)
%o A294773 (PARI) {a(n) = sumdiv(n, d, d^(d+n+1))}
%Y A294773 Cf. A294645, A294704, A294757.
%K A294773 nonn
%O A294773 1,2
%A A294773 _Seiichi Manyama_, Nov 08 2017