cp's OEIS Frontend

A221929 T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.

%I A221929 #6 Jul 23 2025 02:20:21
%S A221929 1,3,1,6,25,1,13,232,184,1,28,2197,5748,1367,1,60,20933,201378,153652,
%T A221929 10179,1,129,198589,6888458,20246283,4053833,75782,1,277,1885324,
%U A221929 236114556,2568601026,2007184132,107220027,564169,1,595,17896442
%N A221929 T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.
%C A221929 Table starts
%C A221929 .1.......3..........6...........13...........28...........60............129
%C A221929 .1......25........232.........2197........20933.......198589........1885324
%C A221929 .1.....184.......5748.......201378......6888458....236114556.....8089630790
%C A221929 .1....1367.....153652.....20246283...2568601026.326363935235.41397744561659
%C A221929 .1...10179....4053833...2007184132.938516646422
%C A221929 .1...75782..107220027.199492714651
%C A221929 .1..564169.2834169558
%C A221929 .1.4200043
%C A221929 .1
%H A221929 R. H. Hardin, <a href="/A221929/b221929.txt">Table of n, a(n) for n = 1..49</a>
%e A221929 Some solutions for n=3 k=4
%e A221929 ..0..2..2..2....0..1..1..0....0..1..0..1....2..0..0..1....0..1..2..0
%e A221929 ..1..1..2..0....1..1..3..1....0..2..0..2....0..4..3..0....0..1..4..0
%e A221929 ..1..0..0..1....0..3..0..1....2..2..0..2....0..0..2..0....0..2..0..2
%Y A221929 Column 2 is A221777
%Y A221929 Row 1 is A002478
%K A221929 nonn,tabl
%O A221929 1,2
%A A221929 _R. H. Hardin_ Feb 01 2013