1,1

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

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 399.

A. Schiemann, Brandt-Intrau tables recomputed

Cf. A006377, A071136.

Sequence in context: A126815 A053619 A112663 this_sequence A121739 A166729 A131850

Adjacent sequences: A006374 A006375 A006376 this_sequence A006378 A006379 A006380

nonn,nice

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