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 A171406 #13 Feb 16 2025 08:33:11 %S A171406 219,220,222,226,546,551,552,557,558,561,563,564,577,578,599,600,926, %T A171406 927,928,930,931,932,937,939,940,959,960,961,965,967,968,1347,1348, %U A171406 1378,1381,1447,1448,1449,1450,1469,1470,1473,1477,1479,1480,1482,1486,1943,1944,1946,1963 %N A171406 Solutions to the equation M(n) = 4 (M = Mertens's function A002321). %H A171406 Seiichi Manyama, <a href="/A171406/b171406.txt">Table of n, a(n) for n = 1..10000</a> %H A171406 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/MertensFunction.html">Mertens Function</a> %Y A171406 Cf. A002321. %K A171406 nonn %O A171406 1,1 %A A171406 Neven Juric (neven.juric(AT)apis-it.hr), Sep 29 2010 %E A171406 More terms from _Seiichi Manyama_, Jan 05 2019