login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A255149 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 1 and no column sum 1 9
47, 115, 115, 302, 371, 302, 784, 1310, 1310, 784, 2086, 4576, 6271, 4576, 2086, 5661, 16386, 29731, 29731, 16386, 5661, 15406, 59681, 143993, 190731, 143993, 59681, 15406, 41999, 217262, 706102, 1241971, 1241971, 706102, 217262, 41999, 114801 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
.....47......115.......302.........784.........2086...........5661
....115......371......1310........4576........16386..........59681
....302.....1310......6271.......29731.......143993.........706102
....784.....4576.....29731......190731......1241971........8173810
...2086....16386....143993.....1241971.....10864279.......96066842
...5661....59681....706102.....8173810.....96066842.....1141237349
..15406...217262...3459923....53762469....848440805....13537915704
..41999...791181..16957488...353508918...7490188992...160551042845
.114801..2886865..83205092..2326278688..66184319354..1905704039315
.314146.10536452.408315639.15311112333.584890655201.22622439606750
LINKS
FORMULA
Empirical for column k:
k=1: [linear recurrence of order 13]
k=2: [order 22]
k=3: [order 42]
k=4: [order 76]
EXAMPLE
Some solutions for n=4 k=4
..0..1..1..1..1..1....1..1..1..0..1..1....1..1..1..0..1..1....0..1..1..1..0..1
..1..0..1..1..0..1....0..1..1..1..1..1....0..1..1..1..1..0....1..1..0..1..1..0
..1..1..1..1..1..0....1..1..1..1..1..0....1..0..1..1..1..1....1..1..1..1..1..1
..0..1..1..1..1..1....1..0..1..1..1..1....1..1..1..1..1..1....1..1..1..0..1..1
..1..1..1..1..0..1....1..1..0..1..1..1....1..1..0..1..1..1....1..1..1..1..1..1
..1..0..1..1..1..0....0..1..1..1..0..1....0..1..1..1..0..1....1..1..1..1..1..0
CROSSREFS
Sequence in context: A044615 A142057 A246932 * A255142 A114646 A239686
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 15 2015
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 26 07:39 EST 2024. Contains 370335 sequences. (Running on oeis4.)