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 A230437 #28 May 17 2023 08:41:58 %S A230437 1,0,5,9,7,3,2,6,7,2,2,0,2,1,3,9,8,0,8,7,4,6,9,6,9,3,7,6,9,9,2,5,8,3, %T A230437 2,5,1,2,1,1,6,7,7,0,5,7,3,6,2,0,3,6,5,1,5,3,0,6,8,4,1,6,4,8,2,6,6,1, %U A230437 8,9,1,1,4,6,4,1,1,8,3,9,2,9,8,3,2,8,3,2,7,0,5,3,4,9,5,8,3,7,3,7,9,6,2,0 %N A230437 Decimal expansion of (2/(3 - 2^(1/2)))^(1/4). %C A230437 Approximation to the frequency ratio of a semitone in equal temperament, suggested by Marin Mersenne. %C A230437 This constant is close to A010774, the frequency ratio of a semitone in equal temperament. The difference is 0.0002695778428445... %H A230437 Wikipedia, <a href="http://en.wikipedia.org/wiki/Marin_Mersenne">Marin Mersenne</a>. %H A230437 Wikipedia, <a href="http://en.wikipedia.org/wiki/Semitone">Semitone</a>. %H A230437 <a href="https://oeis.org/wiki/Index_to_OEIS:_Section_Mu#music">OEIS index entry for music</a>. %H A230437 <a href="https://oeis.org/wiki/The_multi-faceted_reach_of_the_OEIS#Music">The multi-faceted reach of the OEIS: Music</a>. %e A230437 1.059732672202139808746969376992583251211677... %t A230437 RealDigits[Surd[2/(3 - 2^(1/2)), 4], 10, 120][[1]] (* _Amiram Eldar_, May 16 2023 *) %Y A230437 Cf. A010774, A221363, A229943, A229948. %K A230437 nonn,cons %O A230437 1,3 %A A230437 _Omar E. Pol_, Oct 25 2013