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 A193254 #19 Aug 23 2017 06:11:43
%S A193254 1,1,1,1,1,1,4,1,4,1,6,1,4,4,1,1,1,4,13,1,4,6,12,1,6,4,13,4,8,1,24,1,
%T A193254 6,1,4,4,13,13,4,1,6,4,32,6,4,12,24,1,32,6,1,4,14,13,6,4,13,8,30,1,24,
%U A193254 24,4,1,4,6,48,1,12,4,48,4,13,13,6,13,24,4,56,1,40,6,42,4,1,32,8,6,12,4,4,12,24,24,13,1,4,32,24,6,31,1,72,4,4
%N A193254 Sum of odd divisors of lambda(n).
%C A193254 Lambda is the function in A002322.
%H A193254 Antti Karttunen, <a href="/A193254/b193254.txt">Table of n, a(n) for n = 1..10000</a>
%F A193254 a(n) = A000593(A002322(n)).
%e A193254 a(19) = 13 because lambda(19) = 18 and the sum of the 3 odd divisors {1, 3, 9} is 13.
%t A193254 Table[Total[Select[Divisors[CarmichaelLambda[n]], OddQ[ # ]&]], {n, 67}]
%o A193254 (PARI) a(n) = sumdiv(lcm(znstar(n)[2]), d, d*(d%2));
%Y A193254 Cf. A002322, A000593, A193169, A193454.
%K A193254 nonn
%O A193254 1,7
%A A193254 _Michel Lagneau_, Jul 22 2011
%E A193254 More terms from _Antti Karttunen_, Aug 22 2017