[seqfan] %C A178842 Arranging in line, not array(?)
zak seidov
zakseidov at yahoo.com
Fri Jun 18 18:32:22 CEST 2010
May be simply:
Number of ways to place n objects in a line of length (n-1)^2.
And in such case "(n-1)^2" seems unnecessarily arbitrary, right?
Zak
%S A178842 0,0,4,126,4368,177100,8347680,450978066,
%N A178842 a(n) = C((n-1)^2, n)
%C A178842 Number of ways to place n objects in an (n-1) x (n-1) array (e.g., the number of ways to arrange stars in a flag's field pattern)
%K A178842 nonn,new
%O A178842 1,3
%A A178842 Tom Young (mcgreg265(AT)msn.com), Jun 17 2010
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