cp's OEIS Frontend

A068255 1/5 the number of colorings of an n X n square array with 5 colors.

%I A068255 #17 Sep 23 2019 06:39:41
%S A068255 1,52,28564,165770032,10164078082036,6584229526795818280,
%T A068255 45062665956031451017237456,3258395057698765483724093981321824,
%U A068255 2489232886416012985921659124731697904597044,20091032492258710696689787524926465967570325433558752
%N A068255 1/5 the number of colorings of an n X n square array with 5 colors.
%H A068255 Jean-François Alcover, <a href="/A068255/b068255.txt">Table of n, a(n) for n = 1..14</a>
%t A068255 A222144 = Cases[Import["https://oeis.org/A222144/b222144.txt", "Table"], {_, _}][[All, 2]];
%t A068255 a[n_] := A222144[[2 n^2 - 2 n + 1]];
%t A068255 Table[a[n], {n, 1, 14}] (* _Jean-François Alcover_, Sep 23 2019 *)
%Y A068255 Main diagonal of A222144.
%Y A068255 Cf. A068239-A068305, A000332, A002417, A027441, A182368, A182406.
%K A068255 nonn
%O A068255 1,2
%A A068255 _R. H. Hardin_, Feb 24 2002
%E A068255 a(8)-a(10) from _Alois P. Heinz_, Apr 27 2012