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 A054005 #21 Oct 27 2023 22:00:45
%S A054005 24,2160,2640,4320,51840,65280,115200,138240,194400,186048,276480,
%T A054005 483840,622080,700416,950400,984960,1118880,1128960,1612800,2661120,
%U A054005 3937248,3617280,5019840,6128640,5806080,7375680,8467200,11583936
%N A054005 Sum of divisors of k such that k and k+1 have the same number and sum of divisors.
%H A054005 Amiram Eldar, <a href="/A054005/b054005.txt">Table of n, a(n) for n = 1..1831</a>
%F A054005 a(n) = sigma(A054004(n)).
%e A054005 See example in A054004.
%t A054005 Select[Partition[Table[{n,DivisorSigma[0,n],DivisorSigma[1,n]},{n,116*10^5}],2,1],#[[1,2]]== #[[2,2]] && #[[1,3]]==#[[2,3]]&][[All,1,3]] (* _Harvey P. Dale_, May 16 2023 *)
%Y A054005 Cf. A000005, A000203, A002961, A005237, A053249, A054004, A054006, A054007.
%K A054005 nonn
%O A054005 1,1
%A A054005 _Asher Auel_, Jan 12 2000
%E A054005 More terms from _Jud McCranie_, Oct 15 2000
%E A054005 Definition clarified by _Harvey P. Dale_, May 16 2023