|
|
A282556
|
|
Number of n X 4 0..1 arrays with no 1 equal to more than two of its king-move neighbors, with the exception of exactly one element.
|
|
1
|
|
|
0, 36, 618, 6284, 73140, 766472, 7774180, 77796496, 762302160, 7378886108, 70685503542, 671138516516, 6326727994922, 59273960871188, 552390880671856, 5124280101956484, 47344145084965492, 435863812736016840
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n) = 14*a(n-1) -17*a(n-2) -190*a(n-3) -1006*a(n-4) +3164*a(n-5) +7125*a(n-6) +5766*a(n-7) -66778*a(n-8) +34886*a(n-9) +25834*a(n-10) -85288*a(n-11) +31315*a(n-12) -51976*a(n-13) -9686*a(n-14) +30964*a(n-15) -43541*a(n-16) +5466*a(n-17) -6977*a(n-18) +1458*a(n-19) +7732*a(n-20) -372*a(n-21) -343*a(n-22) -394*a(n-23) -104*a(n-24) +50*a(n-25) +4*a(n-27) -a(n-28).
|
|
EXAMPLE
|
Some solutions for n=4
..1..0..0..1. .0..1..0..1. .0..1..0..0. .1..1..0..1. .1..1..0..1
..0..0..0..0. .0..0..1..1. .0..0..0..1. .0..0..1..0. .0..0..1..1
..1..1..0..0. .0..0..0..0. .0..1..0..0. .1..0..0..1. .0..0..0..0
..1..0..1..1. .0..1..0..0. .0..1..1..1. .1..1..0..1. .1..1..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|