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URL: https://oeis.org/history?seq=A193309

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

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Number of n X n symmetric 0..3 arrays with no element equal to any horizontal or vertical neighbor, containing at least one 3 and with new values 0..3 introduced in lower triangular row major order.
#10 by Sean A. Irvine at Fri Oct 03 05:55:56 EDT 2025
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#9 by Sean A. Irvine at Fri Oct 03 05:55:55 EDT 2025
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#8 by Sean A. Irvine at Tue Jul 22 12:23:19 EDT 2025
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#7 by Sean A. Irvine at Tue Jul 22 12:23:17 EDT 2025
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#6 by Charles R Greathouse IV at Fri Dec 18 18:17:42 EST 2015
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Discussion
Fri Dec 18
18:17
OEIS Server: https://oeis.org/edit/global/2478
#5 by Russ Cox at Sat Mar 31 12:36:21 EDT 2012
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Sat Mar 31
12:36
OEIS Server: https://oeis.org/edit/global/875
#4 by Ron Hardin at Fri Jul 22 05:45:57 EDT 2011
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#3 by Ron Hardin at Fri Jul 22 05:45:54 EDT 2011
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#2 by Ron Hardin at Fri Jul 22 05:45:32 EDT 2011
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#1 by Ron Hardin at Fri Jul 22 05:43:25 EDT 2011
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