1,2

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

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

W. Ahrens, Mathematische Unterhaltungen und Spiele. Teubner, Leipzig, Vol. 1, 3rd ed., 1921; Vol. 2, 2nd ed., 1918. See Vol. 1, p. 271.

W. Ahrens, Mathematische Unterhaltungen und Spiele, Leipzig: B. G. Teubner, 1901.

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

D. Atkinson, Solution to the n-Bishops problem of trying to place n identical bishops on an n x n chessboard.

Sequence in context: A056786 A006056 A098620 this_sequence A079473 A145164 A113078

Adjacent sequences: A002462 A002463 A002464 this_sequence A002466 A002467 A002468

nonn,nice,more

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

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Nov 20 2006

Definition corrected. - Max Alekseyev (maxale(AT)gmail.com), Oct 18 2008