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 A171436 #8 Oct 08 2018 11:30:05 %S A171436 586,589,591,592,1355,1356,1358,1359,1360,1365,1367,1368,1369,1371, %T A171436 1372,1385,1386,1434,1437,1439,1440,1442,1983,1984,1986,1995,1996, %U A171436 2047,2048,2054,2059,2060,2061,2063,2064,2066,2073,2077,2081,2190,2193,2213,2214,2242 %N A171436 Solutions to the equation M(n) = 7 (M = Mertens's function A002321). %H A171436 Harvey P. Dale, <a href="/A171436/b171436.txt">Table of n, a(n) for n = 1..1000</a> %t A171436 Position[Accumulate[MoebiusMu[Range[3000]]],7]//Flatten (* _Harvey P. Dale_, Oct 08 2018 *) %K A171436 nonn %O A171436 1,1 %A A171436 Neven Juric (neven.juric(AT)apis-it.hr), Sep 29 2010 %E A171436 More terms from _Harvey P. Dale_, Oct 08 2018