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A263515 Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 filled by rows with each element moved a city block distance of 0 or 1, and rows and columns in increasing lexicographic order.

%I A263515 #6 Nov 10 2015 12:13:15
%S A263515 29,660,18369,489294,13332096,362159570,9866744449,268827612021,
%T A263515 7327820172316,199763751307958,5446244243395198,148487857544502671,
%U A263515 4048490973231712506,110382192841761372934,3009586412715099906678
%N A263515 Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 filled by rows with each element moved a city block distance of 0 or 1, and rows and columns in increasing lexicographic order.
%C A263515 Column 4 of A263519.
%H A263515 R. H. Hardin, <a href="/A263515/b263515.txt">Table of n, a(n) for n = 1..210</a>
%e A263515 Some solutions for n=3
%e A263515 ..0..1..2..3..4....0..1..2..3..4....0..1..2..8..9....0..1..2..3..9
%e A263515 ..5..6..7..8..9....6..5..7..9..8....5..6..7..3..4....6..5.12.13..4
%e A263515 .10.11.17.14.13...10.11.17.12.19...10.12.11.13.14...10.16..7..8.14
%e A263515 .15.16.12.18.19...15.16.18.13.14...15.16.17.18.19...15.11.17.18.19
%Y A263515 Cf. A263519.
%K A263515 nonn
%O A263515 1,1
%A A263515 _R. H. Hardin_, Oct 19 2015