Search: id:A068240
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%I A068240
%S A068240 1,3906,3000366,414425080,19064362455,428429377026,5861180425996,
%T A068240 55823546748096,403783634784285,2353615149832210,11531349080992026,
%U A068240 48981767072238936,184656623163700051,629125059062885490
%N A068240 1/2 the number of colorings of a 4 X 4 square array with n colors.
%Y A068240 Cf. A068239-A068305, A000332, A002417, A027441.
%Y A068240 Sequence in context: A135202 A115468 A066386 this_sequence A022212 A131409 
               A136459
%Y A068240 Adjacent sequences: A068237 A068238 A068239 this_sequence A068241 A068242 
               A068243
%K A068240 nonn
%O A068240 2,2
%A A068240 Ron Hardin (rhhardin(AT)att.net), Feb 24 2002

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