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 A377736 #7 Nov 06 2024 04:40:06
%S A377736 154,282674,3003599678
%N A377736 Numbers k such that k, k+1 and k+2 are all terms in A377732.
%D A377736 144544673718847655 and 10931129469745989328319 are also terms (De Koninck et al., 2024, section 6).
%H A377736 Jean-Marie De Koninck, A. Arthur Bonkli Razafindrasoanaivolala, and Hans Schmidt Ramiliarimanana, <a href="https://doi.org/10.1007/s40993-024-00520-x">Integers with a sum of co-divisors yielding a square</a>, Research in Number Theory, Vol. 10, No. 2 (2024), Article 30; <a href="https://www.jeanmariedekoninck.mat.ulaval.ca/fileadmin/Documents/Publications/2023_integers_with_a_sum_of_co-divisors_yielding_a_square.pdf">author's copy</a>.
%o A377736 (PARI) is1(k) = if(issquare(k), issquare(2 * sqrtint(k)), my(d = divisors(k), nh = #d/2); issquare(d[nh] + d[nh + 1]));
%o A377736 lista(kmax) = {my(q1 = is1(1), q2 = is1(2), q3); for(k = 3, kmax, q3 = is1(k); if(q1 && q2 && q3, print1(k-2, ", ")); q1 = q2; q2 = q3);}
%Y A377736 Subsequence of A377732 and A377733.
%K A377736 nonn,more,bref
%O A377736 1,1
%A A377736 _Amiram Eldar_, Nov 05 2024