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 A378059 #9 Nov 15 2024 12:56:13
%S A378059 112375899,871651143,1525038515,3524721824,6058144224,7616307699,
%T A378059 7929320399,9778346864,10799650575,11536526000,13663711775,
%U A378059 20596306224,22326106256,24442111385,26385908912,27394105760,28476579725,31552570400,34148839725,36045427040,40916036304,44037977984,44430326199
%N A378059 Numbers k such k | A378056(k) and (k+1) | A378056(k+1).
%o A378059 (PARI) is1(k) = {my(d = divisors(k)); !(lcm(apply(x->x+1, d)) % k) && !(lcm(apply(x -> if(x > 1, x-1, x), d)) % k);}
%o A378059 lista(kmax) = {my(q1 = is1(1), q2); for(k = 2, kmax, q2 = is1(k); if(q1 && q2, print1(k-1, ", ")); q1 = q2);}
%Y A378059 Intersection of A377951 and A377953.
%Y A378059 Subsequence of A378058.
%Y A378059 Cf. A378055, A378056.
%K A378059 nonn
%O A378059 1,1
%A A378059 _Amiram Eldar_, Nov 15 2024