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%I #5 Mar 31 2012 12:37:16
%S 15040,2019514,158967751,8967460486,380160979265,12920283700575,
%T 373780805511860,9750412079156987,241430247391621937,
%U 5901330382868059064,145523611667737349951,3643493262426579273152,92443587623539722540173
%N Number of (n+1)X4 0..3 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing
%C Column 3 of A207300
%H R. H. Hardin, <a href="/A207297/b207297.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 72*a(n-1) -1686*a(n-2) +5072*a(n-3) +401103*a(n-4) -6241272*a(n-5) +15657512*a(n-6) +403835904*a(n-7) -3944527488*a(n-8) +8453431296*a(n-9) +64599109632*a(n-10) -475519942656*a(n-11) +1287747403776*a(n-12) -1583479259136*a(n-13) +701730127872*a(n-14) for n>46
%e Some solutions for n=4
%e ..0..2..3..1....3..1..3..1....2..0..3..3....1..0..1..1....3..3..0..3
%e ..1..2..2..3....2..0..1..3....0..0..3..3....2..0..3..3....2..1..0..3
%e ..0..0..0..0....3..2..3..1....2..0..0..0....1..0..3..3....1..0..0..1
%e ..2..2..3..0....2..3..2..1....1..0..0..2....3..0..1..1....2..2..0..0
%e ..2..2..3..0....0..3..1..2....2..0..0..2....0..0..0..3....0..3..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 16 2012
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