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%I #6 Mar 31 2012 12:37:26
%S 1,2,5,12,33,99,319,980,2966,8776,26196,77510,234031,708205,2132677,
%T 6421621,19225005,57566221,172152197,515505478,1541863101,4618183861,
%U 13838387169,41464367959,124065165161,371090483661,1110570396650
%N Number of nX1 0..6 arrays with every element value z a city block distance of exactly z from another element value z
%C Column 1 of A209054
%H R. H. Hardin, <a href="/A209051/b209051.txt">Table of n, a(n) for n = 1..210</a>
%e All solutions for n=4
%e ..0....1....0....1....3....0....0....3....2....0....1....2
%e ..0....1....1....1....0....0....1....1....2....2....1....0
%e ..1....0....1....1....0....0....1....1....2....0....1....2
%e ..1....0....1....0....3....0....0....3....2....2....1....0
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 04 2012