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 A235386 #18 Feb 25 2025 05:46:00 %S A235386 1,5,11,23,33,65,85,109,133,187,215,285,361,447,491,591,643,695,747, %T A235386 931,991,1193,1267,1343,1569,1739,2087,2181,2277,2471,2573,2669,2781, %U A235386 3327,3557,3681,3923,4299,4431,4561,4833,4969 %N A235386 Numbers k such that A235141(k) = 1. %C A235386 The positions reflect square radii which are uniquely twice a square integer, that is, the inclusion of only one square on the y = x line. %F A235386 a(n+1) = A235142(n) + 1, a(1)=1. %e A235386 for n=3, a(3) = 11. The eleventh term of A235141 is 1 reflecting an increase in the square radius of the circle from exactly 8 to the open interval of (8,9). %Y A235386 A000548(n) = A001481(1 + (a(n+1)-1)/2)/2. %Y A235386 Cf. A235141, A234300. %K A235386 nonn %O A235386 1,2 %A A235386 _Rajan Murthy_, Jan 08 2014