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 A347384 #7 Sep 17 2021 16:16:05 %S A347384 35,105,153,189,207,279,403,423,425,437,455,475,477,575,589,639,689, %T A347384 725,765,775,819,833,899,923,945,963,1025,1035,1071,1127,1143,1175, %U A347384 1209,1271,1275,1311,1325,1341,1365,1391,1395,1421,1425,1449,1475,1495,1519,1651,1719,1725,1739,1767,1775,1791,1881,1927,1953,1961 %N A347384 Odd numbers k with such a unitary divisor d that A347381(d) > A347381(k). %H A347384 <a href="/index/Pri#prime_indices">Index entries for sequences computed from indices in prime factorization</a> %H A347384 <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a> %e A347384 35 is a product of two primes, 5 and 7, with A347381(7) = 3 > A347381(35) = 2, therefore 35 is included in this sequence. %o A347384 (PARI) isA347384(n) = if(!(n%2),0,my(w=A347381(n)); fordiv(n,d,if(1==gcd(d,n/d) && (A347381(d)>w), return(1))); (0)); %Y A347384 Cf. A347381. %Y A347384 Subsequences: A347390, A347383. %K A347384 nonn %O A347384 1,1 %A A347384 _Antti Karttunen_, Sep 10 2021