A222335 - OEIS

%I #5 Feb 15 2013 11:41:31

%S 6,186,5766,178746,5541126,171774906,5325022086,165075684666,

%T 5117346224646,158637732964026,4917769721884806,152450861378428986,

%U 4725976702731298566,146505277784670255546,4541663611324777921926

%N Number of nX2 0..6 arrays with no entry increasing mod 7 by 6 rightwards or downwards, starting with upper left zero

%C Column 2 of A222340

%H R. H. Hardin, <a href="/A222335/b222335.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 31*a(n-1)

%e Some solutions for n=3

%e ..0..4....0..4....0..1....0..3....0..4....0..0....0..4....0..1....0..3....0..0

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 15 2013