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A233944 Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 4 1

%I

%S 1150,19484,328508,5601514,95457842,1628628304,27781166008,

%T 473979079512,8086137608310,137956079585788,2353599624978228,

%U 40154007613944408,685051045034336864,11687408029675999666,199394347157350034134

%N Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 4

%C Column 3 of A233949

%H R. H. Hardin, <a href="/A233944/b233944.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 22*a(n-1) +20*a(n-2) -2402*a(n-3) +8315*a(n-4) +57619*a(n-5) -297894*a(n-6) -394397*a(n-7) +3586512*a(n-8) -630788*a(n-9) -18290282*a(n-10) +13131067*a(n-11) +44278092*a(n-12) -40653252*a(n-13) -53889205*a(n-14) +50657365*a(n-15) +32681066*a(n-16) -27199613*a(n-17) -9122229*a(n-18) +6034975*a(n-19) +846023*a(n-20) -477739*a(n-21) -19115*a(n-22) +11259*a(n-23) -26*a(n-24) -40*a(n-25)

%e Some solutions for n=2

%e ..0..2..0..0....1..2..1..0....0..2..0..1....2..0..0..0....0..2..2..0

%e ..1..2..2..2....0..1..0..1....1..2..0..2....2..1..2..0....0..0..2..2

%e ..0..0..0..1....0..2..2..2....1..0..0..0....1..0..2..0....2..1..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 18 2013

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Last modified September 29 06:25 EDT 2022. Contains 357082 sequences. (Running on oeis4.)