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 A342398 #15 Mar 11 2021 03:32:33 %S A342398 30,42,66,78,102,114,138,150,174,186,210,222,246,258,282,294,318,330, %T A342398 354,366,390,402,420,426,438,462,474,498,510,534,546,570,582,606,618, %U A342398 630,642,654,660,678,690,714,726,750,762,770,780,786,798,822,834,840,858 %N A342398 Numbers k such that there is a subset of the nontrivial unitary divisors of k, {d|k : 1 < d < k, gcd(d, k/d) = 1}, that adds up to k. %H A342398 Amiram Eldar, <a href="/A342398/b342398.txt">Table of n, a(n) for n = 1..10000</a> %e A342398 30 is a term since its proper unitary divisors, 1 < d < 30, are {2, 3, 5, 6, 10, 15}, and 5 + 10 + 15 = 30. %t A342398 q[n_] := Module[{d = Most @ Select[Divisors[n], CoprimeQ[#, n/#] &], x}, Plus @@ d >= n && SeriesCoefficient[Series[Product[1 + x^d[[i]], {i, 2, Length[d]}], {x, 0, n}], n] > 0]; Select[Range[1000], q] %Y A342398 The unitary version of A136446. %Y A342398 Subsequence of A034683 and A293188. %K A342398 nonn %O A342398 1,1 %A A342398 _Amiram Eldar_, Mar 10 2021