4,2

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

E. R. Cohen and B. N. Taylor, The 1986 adjustment of the fundamental physical constants, Rev. Modern Phys., 59 (1987), 1121-1148.

K. R. Lang, Astrophysical Data: Planets and Stars, Springer-Verlag, NY, 1991.

Sequence in context: A131641 A085672 A019866 this_sequence A085011 A099724 A024568

Adjacent sequences: A006830 A006831 A006832 this_sequence A006834 A006835 A006836

nonn,cons

N. J. A. Sloane (njas(AT)research.att.com).