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 A129861 #3 Sep 24 2018 16:53:14 %S A129861 1,4,9,1,16,25,4,36,1,9,64,81,16,4,121,1,144,9,36,196,225,4,16,1,64, %T A129861 324,25,9,400,441,100,4,529,1,576,49,144,676,9,25,64,841,4,900,1,36, %U A129861 16,1089,256,100,1225,49,1296,25,324,4,1521,81,144,1681,16,36,169,81,1936,9,484 %N A129861 Smallest square s such that A024352(n) + s is square. %F A129861 y(y+e) = A024352(n), where e is the smallest even number that satisfies this equation, A(n) = (e/2)^2. %e A129861 5(5+6) = 55, smallest square = (6/2)^2 = 9 %e A129861 4(4+10) = 56, smallest square = (10/2)^2 = 25 %e A129861 3(3+16) = 57, smallest square = (16/2)^2 = 64 %e A129861 1(1+58) = 59, smallest square = (58/2)^2 = 841 %e A129861 6(6+4) = 60, smallest square = (4/2)^2 = 4 %e A129861 1(1+60) = 61, smallest square = (60/2)^2 = 900 %e A129861 7(7+2) = 63, smallest square = (2/2)^2 = 1 %e A129861 etc. %Y A129861 Cf. A024352. %K A129861 nonn %O A129861 1,2 %A A129861 _Andrew S. Plewe_, May 23 2007