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!)
A281888 T(n,k)=Number of nXk 0..1 arrays with no element equal to more than four of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. 6
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 68, 0, 0, 0, 0, 638, 638, 0, 0, 0, 0, 4832, 9284, 4832, 0, 0, 0, 0, 35002, 112320, 112320, 35002, 0, 0, 0, 0, 241209, 1282388, 2156646, 1282388, 241209, 0, 0, 0, 0, 1612568, 13907664, 38763782, 38763782, 13907664, 1612568, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,13

COMMENTS

Table starts

.0.0........0...........0.............0...............0.................0

.0.0........0...........0.............0...............0.................0

.0.0.......68.........638..........4832...........35002............241209

.0.0......638........9284........112320.........1282388..........13907664

.0.0.....4832......112320.......2156646........38763782.........663476572

.0.0....35002.....1282388......38763782......1091754188.......29340232714

.0.0...241209....13907664.....663476572.....29340232714.....1239784258612

.0.0..1612568...146131060...10998070526....763669110112....50762954675186

.0.0.10566034..1503637694..178432948526..19447316121332..2032908127837419

.0.0.68136376.15223224224.2848000336302.487171820681716.80080573259154704

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..179

FORMULA

Empirical for column k:

k=1: a(n) = a(n-1)

k=2: a(n) = a(n-1)

k=3: [order 14] for n>17

k=4: [order 46] for n>49

EXAMPLE

Some solutions for n=4 k=4

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

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

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

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

CROSSREFS

Sequence in context: A279798 A191941 A087536 * A282338 A198210 A329061

Adjacent sequences:  A281885 A281886 A281887 * A281889 A281890 A281891

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 01 2017

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 17 15:20 EST 2022. Contains 350402 sequences. (Running on oeis4.)