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!)
A188607 T(n,k)=Number of nXk binary arrays without the pattern 1 1 0 diagonally, vertically, antidiagonally or horizontally 14
2, 4, 4, 7, 16, 7, 12, 49, 49, 12, 20, 144, 211, 144, 20, 33, 400, 847, 883, 400, 33, 54, 1089, 3282, 4914, 3354, 1089, 54, 88, 2916, 12405, 26723, 24711, 12529, 2916, 88, 143, 7744, 45860, 140617, 181626, 123984, 45705, 7744, 143, 232, 20449, 167525, 721597 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

...2.....4.......7.......12.........20..........33............54.............88

...4....16......49......144........400........1089..........2916...........7744

...7....49.....211......847.......3282.......12405.........45860.........167525

..12...144.....883.....4914......26723......140617........721597........3648942

..20...400....3354....24711.....181626.....1288734.......8951764.......61078115

..33..1089...12529...123984....1238275....11895711.....111888105.....1031943536

..54..2916...45705...602049....8077216...104225541....1318303126....16339159241

..88..7744..165506..2925040...52884231...919272280...15651179908...260970703443

.143.20449..595370.14100232..342253692..7996186202..182869043451..4096182114761

.232.53824.2135861.67998376.2219051847.69774651726.2144672066828.64567134345340

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..312

EXAMPLE

Some solutions for 5X3

..0..0..1....0..0..0....0..1..0....0..1..1....1..0..0....0..0..0....0..0..0

..0..1..0....0..0..0....0..0..1....0..0..0....0..0..0....0..1..0....1..0..1

..1..0..0....1..0..0....0..0..0....1..0..1....1..1..1....1..0..0....0..0..0

..0..0..1....1..1..1....1..1..1....1..0..0....0..0..0....0..0..1....1..1..1

..0..1..0....1..1..1....1..0..1....1..0..0....0..1..1....0..0..1....0..0..0

CROSSREFS

Row 1 and Column 1 are A000071(n+3)

Row 2 and Column 2 are A188516

Sequence in context: A227679 A223782 A223716 * A188851 A188523 A206785

Adjacent sequences:  A188604 A188605 A188606 * A188608 A188609 A188610

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Apr 05 2011

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 May 25 06:43 EDT 2022. Contains 354049 sequences. (Running on oeis4.)