|
| |
|
|
A141509
|
|
Number of n X n binary matrices, symmetric under horizontal reflection, with no more than 3 ones in any 2 X 2 subblock.
|
|
1
|
|
|
|
1, 2, 3, 57, 128, 22077, 65205, 114142368, 468343535, 7969215344753, 44467930404864, 7479088292930771309, 57134805472751200753, 94492733598842569249024512, 986251920362343910672065291
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,2
|
|
|
LINKS
|
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
