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 A228817 #47 May 21 2019 23:52:38 %S A228817 1,2,1,0,2 %N A228817 Decimal expansion of Planck force: F_P = c^4/G, in SI units. %C A228817 According to the law of universal gravitation, the attractive force (F) between two bodies is proportional to the product of their masses (m_1 and m_2), and inversely proportional to the square of the distance, r, between them. Newton's formula is F = G*m_1*m_2/r^2, where G is the constant of gravitation. Using both the Planck force (F_P) and Einstein's formula E = m*c^2, the law of universal gravitation could be written as F = (G/c^4)*m_1*c^2*m_2*c^2/r^2 = E_1*E_2/(F_P*r^2), where E_1 and E_2 are the energies of the bodies. %F A228817 Equals A183001/A070058. %e A228817 F_P = c^4/G = 8077608713062490229263800746151696 (m^4/s^4)/(6.67384...*10^-11 (m^3)/(kg*s^2)) ~ 1.2103...*10^44 (kg*m/s^2), where c is the speed of light in vacuum and G is the Newtonian constant of gravitation. %Y A228817 Cf. A003678, A070058, A183001, A228818. %K A228817 nonn,cons %O A228817 45,2 %A A228817 _Omar E. Pol_, Sep 26 2013 %E A228817 a(49) corrected by _Ivan Panchenko_, May 21 2019