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A188954 Number of nX3 array permutations with each element moved no more than a city block distance of two.

%I A188954 #7 Jul 22 2025 11:28:38
%S A188954 6,362,29172,1722256,104735558,6513224285,402549615544,24857280209008,
%T A188954 1535940257170788,94903086891894000,5863618342142622360,
%U A188954 362289547465186312038,22384463811480689586560,1383047351386729941046442
%N A188954 Number of nX3 array permutations with each element moved no more than a city block distance of two.
%C A188954 Column 3 of A188958
%H A188954 R. H. Hardin, <a href="/A188954/b188954.txt">Table of n, a(n) for n = 1..200</a>
%e A188954 Some solutions for 4X3
%e A188954 ..0..4..2....0..4..2....0..3..1....0..3..2....0..4..2....0..3..1....0..3..5
%e A188954 ..9..8..1....5..8..3....5..7..2....7..5..1....3.10.11....9..2..4....6..2..7
%e A188954 ..6..3..7....9..1.11....4.11..8....6.10..8....8..1..5....8.11..6...10..1..4
%e A188954 .11.10..5....7..6.10....6.10..9...11..4..9....7..6..9...10..7..5...11..9..8
%K A188954 nonn
%O A188954 1,1
%A A188954 _R. H. Hardin_ Apr 14 2011