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 A076404 #14 Feb 16 2025 08:32:47 %S A076404 1,0,0,1,0,1,1,0,0,1,0,1,0,1,1,0,0,1,0,0,1,1,0,1,0,1,1,0,1,0,0,1,0,1, %T A076404 0,1,0,1,0,1,0,0,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,1,0,1,0,1,0,0, %U A076404 1,0,1,1,0,1,0,1,1,0,1,0,1,0,1,0,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,1,0,1,1,0 %N A076404 Odd/even-parity of n-th perfect power. %H A076404 Reinhard Zumkeller, <a href="/A076404/b076404.txt">Table of n, a(n) for n = 1..10000</a> %H A076404 C. J. Glasby, S. P. Glasby, F. Pleijel, <a href="https://doi.org/10.1098/rspb.2008.0418">Worms by number</a>, Proc. Roy. Soc. B, Proc. Biol. Sci. 275 (1647) (2008) 2071-2076. %H A076404 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PerfectPower.html">Perfect Powers</a>. %F A076404 A001597(n) mod 2. %o A076404 (Haskell) %o A076404 a076404 = (`mod` 2) . a001597 -- _Reinhard Zumkeller_, Oct 04 2012 %K A076404 nonn %O A076404 1,1 %A A076404 _Reinhard Zumkeller_, Oct 09 2002