|
|
A234736
|
|
Number of (n+1) X (6+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 8 (constant-stress 1 X 1 tilings).
|
|
1
|
|
|
119904, 233016, 423072, 972888, 2072256, 5395128, 13083552, 37239960, 99668544, 302942136, 872803872, 2789946648, 8503198656, 28292814648, 90149814432, 309941744280, 1023953849664, 3617288003256, 12314264477472, 44498943619608
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n) = 8*a(n-1) +53*a(n-2) -564*a(n-3) -888*a(n-4) +17184*a(n-5) -2382*a(n-6) -296784*a(n-7) +308859*a(n-8) +3196608*a(n-9) -5284083*a(n-10) -22169196*a(n-11) +48357478*a(n-12) +97763896*a(n-13) -273091508*a(n-14) -253071696*a(n-15) +976703832*a(n-16) +271829664*a(n-17) -2148744960*a(n-18) +304750080*a(n-19) +2640988800*a(n-20) -1133222400*a(n-21) -1378944000*a(n-22) +870912000*a(n-23).
|
|
EXAMPLE
|
Some solutions for n=1:
4 6 5 7 1 6 5 7 2 5 2 7 0 5 5 7 2 7 3 7 2
6 0 7 1 3 0 7 4 7 2 7 4 5 2 6 0 3 0 4 0 3
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|