A203260 - OEIS

%I #7 May 25 2024 23:38:59

%S 1,24301646,1956615126953,60474221730991631,1502693979789746374595,

%T 40799258353982022255077487,1180830173140129486377399584664,

%U 33919060341473924740618271770680506

%N Number of n X 6 0..7 arrays with every nonzero element less than or equal to some NW, E or S neighbor.

%C Column 6 of A203262.

%H R. H. Hardin, <a href="/A203260/b203260.txt">Table of n, a(n) for n = 1..23</a>

%e Some solutions for n=4

%e ..3..5..6..3..7..1....5..2..6..6..2..0....5..1..1..4..4..7....7..6..5..1..2..6

%e ..1..2..6..7..7..6....5..2..4..6..2..4....5..4..4..1..1..7....7..6..6..7..1..6

%e ..4..6..3..0..7..0....5..3..2..0..4..4....5..6..4..2..7..7....7..5..4..7..6..6

%e ..0..6..6..0..0..7....5..5..1..3..3..4....4..6..6..7..7..7....7..7..6..7..7..6

%Y Cf. A203262.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 30 2011