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 A072595 #11 Apr 02 2025 22:06:12 %S A072595 4,9,16,25,36,49,64,70,81,100,121,144,169,196,225,256,280,289,324,361, %T A072595 400,441,484,529,576,625,630,646,676,729,784,841,900,961,1024,1089, %U A072595 1120,1156,1225,1296,1369,1444,1521,1600,1681,1750,1764,1798,1849,1936 %N A072595 Numbers k such that A072594(k) = 0. %C A072595 All squares are terms, but also 70 is a term, see example, A072596. %H A072595 Reinhard Zumkeller, <a href="/A072595/b072595.txt">Table of n, a(n) for n = 1..10000</a> %e A072595 A072594(70) = A072594(2*5*7) = A072594(2) 'xor' A072594(5) 'xor' A072594(7) = '010' xor '101' xor '111' = '000' = 0. %o A072595 (Haskell) %o A072595 a072595 n = a072595_list !! (n-1) %o A072595 a072595_list = filter ((== 0) . a072594) [1..] %o A072595 -- _Reinhard Zumkeller_, Nov 17 2012 %Y A072595 Cf. A000290. %K A072595 nonn %O A072595 1,1 %A A072595 _Reinhard Zumkeller_, Jun 23 2002