A140393 Erroneous duplicate of A000170, see comments.

1, 0, 0, 2, 10, 4, 40, 92, 352, 724, 2680, 14200, 73712, 365596, 2279184, 14772512, 95815104, 666090624, 4968057848, 39029188884, 314666222712, 2691008701644, 24233937684440, 226732487925864

Offset: 1

Author

N. J. A. Sloane, Jun 18 2008

Keywords

• dead

Comments

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.

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.

Links

• NQueens(AT)home, Home Page [Via Internet Archive Wayback-Machine]

Crossrefs

See A000170 for further information.

Extensions

a(24) is probably mistaken. - Thomas B. Preußer, Nov 07 2008