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 A087778 #30 Sep 13 2023 08:51:06 %S A087778 6,0,2,2,1,4,1 %N A087778 Decimal expansion of experimental Avogadro's constant (in mol^(-1)). %C A087778 Defined to be number of atoms in 12 grams of carbon-12. %C A087778 This originally was the value as of October 2003. %C A087778 For the exact Avogadro constant N_A = 6.02214076*10^23 mol^(-1) according to the 2019 SI system of units see A322578. - _Wolfdieter Lang_, Feb 12 2019 %C A087778 By definition, the "experimental Avogadro's constant" still makes sense in the 2019 SI as the gram to atomic mass unit ratio, but its current value provided by CODATA is (within the experimental error) identical to the exact Avogadro constant and different from an older value provided in this entry. So the value provided here is obsolete anyway. - _Andrey Zabolotskiy_, Sep 12 2023 %D A087778 CRC Handbook for Chemistry and Physics, 75th edition, (1994-1995), Page 1-1. %H A087778 P. Becker et al., <a href="https://doi.org/10.1088/0026-1394/40/5/010">Determination of the Avogadro constant via the silicon route</a>, Metrologia, 40 (Oct 2003), 271-287. %H A087778 NIST, <a href="https://pml.nist.gov/cgi-bin/cuu/Value?na">CODATA Value: Avogadro constant</a>. %H A087778 NIST, <a href="https://pml.nist.gov/cgi-bin/cuu/Value?kgu">CODATA Value: kilogram-atomic mass unit relationship</a>. %H A087778 Sizes, <a href="https://www.sizes.com/natural/avogadro.htm">Avogadro's constant</a> %H A087778 Eric Weisstein, World of Physics, <a href="http://scienceworld.wolfram.com/physics/AvogadrosNumber.html">Avogadro's Number</a> %H A087778 Wikipedia, <a href="http://en.wikipedia.org/wiki/Avogadro's_number">Avogadro's number</a> %F A087778 6.02214179*10^23 +- 3.0*10^16 per mol. %Y A087778 Cf. A070058-A070060, A070063-A070064, A322578 (exact N_A). %K A087778 dead %O A087778 24,1 %A A087778 _N. J. A. Sloane_, Oct 05 2003 %E A087778 Adapted offset and value to current NIST values by _R. J. Mathar_, Jul 23 2009 %E A087778 Name edited by _Jianing Song_, Jun 16 2019