|
Search: id:A147409
|
|
|
| A147409 |
|
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1001-1001-1111 pattern in any orientation. |
|
+0
1
|
|
| 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 7, 13, 21, 31, 61, 147, 365, 1043, 3041, 10027, 33377, 115807, 406723, 1580475, 6700609
(list; graph; listen)
|
|
|
OFFSET
|
1,10
|
|
|
EXAMPLE
|
Maximal 10 X 10 example
.0.0.0.1.0.0.1.0.0.0
.0.0.0.1.0.0.1.0.0.0
.0.0.0.1.1.1.1.0.0.0
.1.1.1.0.0.0.0.1.1.1
.0.0.1.0.0.0.0.1.0.0
.0.0.1.0.0.0.0.1.0.0
.1.1.1.0.0.0.0.1.1.1
.0.0.0.1.1.1.1.0.0.0
.0.0.0.1.0.0.1.0.0.0
.0.0.0.1.0.0.1.0.0.0
|
|
CROSSREFS
|
Sequence in context: A011898 A098577 A004136 this_sequence A147342 A060939 A098575
Adjacent sequences: A147406 A147407 A147408 this_sequence A147410 A147411 A147412
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net)
|
|
|
Search completed in 0.002 seconds
|
