0,2

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 15.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane, Seven Staggering Sequences, in Homage to a Pied Puzzler, E. Pegg Jr., A. H. Schoen and T. Rodgers (editors), A. K. Peters, Wellesley, MA, 2009, pp. 93-110.

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

N. J. A. Sloane, My favorite integer sequences, in Sequences and their Applications (Proceedings of SETA '98).

G. Nebe and N. J. A. Sloane, Table of highest kissing numbers known

N. J. A. Sloane, Seven Staggering Sequences.

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

Cf. A002336, A028923.

Sequence in context: A011778 A067718 A028923 this_sequence A002336 A030625 A029929

Adjacent sequences: A001113 A001114 A001115 this_sequence A001117 A001118 A001119

nonn,nice,hard

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

Lower bounds for the next 4 terms are 336,438,756,918