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 A292379 #11 Apr 29 2025 13:39:15
%S A292379 7,15,27,31,63,95,127,255,277,305,511,519,1023,1921,2047,2349,3575,
%T A292379 4095,8191,8743,10525,16383,17955,24661,26585,27305,32767,36611,40677,
%U A292379 65535,85173,95571,122915,131071,262143,360213,386019,524287,667879,736251,806603,1020963
%N A292379 Odd numbers k such that A292270((k-1)/2) is a square < ((k-1)/2)^2.
%o A292379 (PARI)
%o A292379 A000265(n) = n >> valuation(n, 2);
%o A292379 A292270(n) = { my(x = n+n+1, m = A000265(1+x), z = m); while(m!=1, z += A000265(x+m); m = A000265(x+m)); z; };
%o A292379 n=1; k=0; while(k < 120, m = A292270(n); if(issquare(m) && (m < n^2), k++; write("b292379.txt", k, " ", 1+(2*n))); n++);
%Y A292379 Subsequence of A292939.
%Y A292379 Doesn't contain any terms of A001122.
%Y A292379 Cf. A000225 (subsequence from its term a(3) = 7 onward).
%Y A292379 Cf. A292270.
%K A292379 nonn
%O A292379 1,1
%A A292379 _Antti Karttunen_ and _Vladimir Shevelev_, Oct 06 2017
%E A292379 More terms from _Jinyuan Wang_, Apr 29 2025