login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A184477 T(n,k)=1/6 the number of (n+2)X(k+2) 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last 10
315, 1095, 1095, 3705, 2755, 3705, 12339, 7085, 7085, 12339, 45585, 19119, 14119, 19119, 45585, 161739, 62213, 30681, 30681, 62213, 161739, 559305, 200215, 86575, 53739, 86575, 200215, 559305, 2147931, 645837, 249953, 127689, 127689, 249953 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......315.....1095.....3705....12339....45585..161739..559305.2147931..7836561

.....1095.....2755.....7085....19119....62213..200215..645837.2386807..8440325

.....3705.....7085....14119....30681....86575..249953..747735.2652785..9085231

....12339....19119....30681....53739...127689..322275..878625.2967411..9800745

....45585....62213....86575...127689...247879..520289.1219455.3727073.11454631

...161739...200215...249953...322275...520289..904411.1782585.4808779.13539521

...559305...645837...747735...878625..1219455.1782585.2909367

..2147931..2386807..2652785..2967411..3727073.4808779

..7836561..8440325..9085231..9800745.11454631

.27667251.29121087.30632409.32238603

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..97

FORMULA

Empirical for columns 3 to at least 4: a(n)=6*a(n-1)-11*a(n-2)+129*a(n-3)-738*a(n-4)+1353*a(n-5)-6290*a(n-6)+33312*a(n-7)-61072*a(n-8)+155640*a(n-9)-733968*a(n-10)+1345608*a(n-11)-2177568*a(n-12)+8661600*a(n-13)-15879600*a(n-14)+18027792*a(n-15)-56197152*a(n-16)+103028112*a(n-17)-89177760*a(n-18)+197883648*a(n-19)-362786688*a(n-20)+256296960*a(n-21)-350479872*a(n-22)+642546432*a(n-23)-390790656*a(n-24)+241864704*a(n-25)-443418624*a(n-26)+241864704*a(n-27)

EXAMPLE

Some solutions with a(1,1)=0 for 5X4

..0..0..1..0....0..1..2..0....0..0..2..0....0..1..1..0....0..1..1..0

..0..1..1..2....0..2..0..0....0..2..0..0....0..1..0..0....0..1..0..0

..2..1..0..0....0..2..2..0....1..2..2..1....2..1..0..2....0..2..1..0

..1..0..0..1....0..2..1..0....0..0..2..0....1..1..0..1....1..0..1..1

..0..1..1..2....0..2..0..0....2..0..0..2....1..0..0..1....1..0..0..1

CROSSREFS

Sequence in context: A109130 A284981 A087415 * A184469 A088010 A145753

Adjacent sequences:  A184474 A184475 A184476 * A184478 A184479 A184480

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 15 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 17 17:08 EDT 2019. Contains 326059 sequences. (Running on oeis4.)