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 A070062 #18 Jul 07 2019 02:22:04 %S A070062 6,0,2,2,1,4,1,9,9 %N A070062 Decimal expansion of old estimate for Avogadro's constant (in mol^(-1)). %C A070062 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 %D A070062 CRC Handbook for Chemistry and Physics, 75th edition, (1994-1995), Page 1-1. %H A070062 NIST, <a href="https://physics.nist.gov/cgi-bin/cuu/Value?na">Avogadro constant</a>. %F A070062 6.02214199*10^23 per mol. %Y A070062 This is the old value - see A087778 and A322578. Cf. A070058-A070060, A070063-A070064. %K A070062 dead %O A070062 24,1 %A A070062 _Wolfdieter Lang_, Feb 12 2019 %E A070062 Offset corrected by _Jianing Song_, Jul 06 2019