login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A218810 T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..3 nXk array 14
1, 3, 1, 7, 15, 1, 15, 61, 57, 1, 29, 249, 481, 225, 1, 57, 993, 3969, 3843, 895, 1, 113, 3969, 31741, 63499, 30719, 3551, 1, 225, 15871, 253877, 1015637, 1015887, 245509, 14089, 1, 449, 63467, 2030789, 16247233, 32496361, 16252713, 1962145, 55905, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

.1........3...........7..............15..................29

.1.......15..........61.............249.................993

.1.......57.........481............3969...............31741

.1......225........3843...........63499.............1015637

.1......895.......30719.........1015887............32496361

.1.....3551......245509........16252713..........1039771513

.1....14089.....1962145.......260019585.........33269071149

.1....55905....15681787......4159932363.......1064494567893

.1...221827...125331399.....66552822351......34060123730017

.1...880191..1001668973...1064747639097....1089805494659041

.1..3492529..8005501761..17034402072321...34869985369949693

.1.13858081.63981275411.272525472991467.1115718250329709413

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..159

EXAMPLE

Some solutions for n=3 k=4

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

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

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

CROSSREFS

Row 1 is A218189

Sequence in context: A322069 A194595 A219063 * A218638 A232295 A228763

Adjacent sequences:  A218807 A218808 A218809 * A218811 A218812 A218813

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Nov 06 2012

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 26 20:33 EST 2020. Contains 331288 sequences. (Running on oeis4.)