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A140393 Erroneous duplicate of A000170, see comments. 1

%I

%S 1,0,0,2,10,4,40,92,352,724,2680,14200,73712,365596,2279184,14772512,

%T 95815104,666090624,4968057848,39029188884,314666222712,2691008701644,

%U 24233937684440,226732487925864

%N Erroneous duplicate of A000170, see comments.

%C This is a new calculation of A000170 which produced a different answer for n=24. I do not know which version is correct and I have therefore created this second entry for the values found by the NQueens(AT)home team. See the main entry for this sequence, A000170, for many further references and comments.

%C As discovered on Nov 07 2008, this sequence is likely to suffer from an overflow error in the implementation of the NQueens(AT)Home project. The results differ by 781684047872 = 0xb600000000 = 182 * 2^32.

%H NQueens(AT)home, <a href="http://nqueens.ing.udec.cl/">Home Page</a> [broken link]

%Y See A000170 for further information.

%K dead

%O 1,4

%A _N. J. A. Sloane_, Jun 18 2008

%E a(24) is probably mistaken. - _Thomas B. Preu├čer_, Nov 07 2008

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Last modified September 25 01:17 EDT 2018. Contains 315360 sequences. (Running on oeis4.)