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URL: https://oeis.org/history?seq=A117613

⇱ The On-Line Encyclopedia of Integer Sequences (OEIS)

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Showing entries 1-10 | older changes
The number of 3D configurations of a labeled size 2*n "wurfel". A wurfel consists of a series of cubes held together on a looped string such that the string makes a right angle inside each cube. Ignoring the labels would make a wurfel a special kind of polycube in which the cubes can be cyclically ordered at consecutive right angles (equivalently, avoiding 3 consecutive collinear cubes).
#12 by N. J. A. Sloane at Sun Aug 12 17:13:28 EDT 2018
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#11 by Michel Marcus at Sun Aug 12 16:54:45 EDT 2018
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#10 by Jon E. Schoenfield at Sun Aug 12 14:52:16 EDT 2018
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#9 by Jon E. Schoenfield at Sun Aug 12 14:52:13 EDT 2018
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#8 by N. J. A. Sloane at Fri Apr 20 00:39:01 EDT 2018
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#7 by Altug Alkan at Thu Apr 19 17:52:42 EDT 2018
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#6 by Altug Alkan at Thu Apr 19 17:52:39 EDT 2018
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#5 by Michael De Vlieger at Thu Apr 19 17:51:45 EDT 2018
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#4 by Michael De Vlieger at Thu Apr 19 17:51:41 EDT 2018
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#3 by Russ Cox at Sat Mar 31 20:08:09 EDT 2012
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Sat Mar 31
20:08
OEIS Server: https://oeis.org/edit/global/1027