cp's OEIS Frontend

A267669 Number of 4Xn 0..1 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.

%I A267669 #4 Jan 19 2016 08:10:24
%S A267669 7,98,453,3143,10933,60401,188301,951113,2812057,13690793,39294261,
%T A267669 188823533,531699829,2551208657,7083277713,34139004377,93677247421,
%U A267669 454955695853,1235099875965,6055154070065,16269918251065,80602553434841
%N A267669 Number of 4Xn 0..1 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.
%C A267669 Row 4 of A267667.
%H A267669 R. H. Hardin, <a href="/A267669/b267669.txt">Table of n, a(n) for n = 1..210</a>
%F A267669 Empirical: a(n) = 5*a(n-1) +46*a(n-2) -255*a(n-3) -804*a(n-4) +5287*a(n-5) +6393*a(n-6) -57990*a(n-7) -17379*a(n-8) +368289*a(n-9) -70362*a(n-10) -1394997*a(n-11) +645844*a(n-12) +3138583*a(n-13) -1858369*a(n-14) -4077534*a(n-15) +2440404*a(n-16) +2940332*a(n-17) -1387260*a(n-18) -1138872*a(n-19) +275184*a(n-20) +183456*a(n-21)
%e A267669 Some solutions for n=7
%e A267669 ..0..1..0..0..1..0..1....0..1..0..1..1..0..0....0..0..1..0..1..0..1
%e A267669 ..0..0..1..0..1..1..0....0..0..1..0..1..0..1....0..1..0..1..1..0..0
%e A267669 ..1..0..1..0..1..0..1....0..1..0..1..1..0..0....1..0..1..0..1..0..0
%e A267669 ..0..1..1..0..1..0..0....0..1..1..0..0..1..0....0..0..1..0..1..0..1
%Y A267669 Cf. A267667.
%K A267669 nonn
%O A267669 1,1
%A A267669 _R. H. Hardin_, Jan 19 2016