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!)
A185472 Number of (n+2)X6 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order 1

%I

%S 34779,225672,1043186,3959167,12990375,37961900,100908633,247920339,

%T 570069808,1239033996,2565887950,5095678058,9756244258,18087995239,

%U 32592776835,57255685167,98315034745,165384433476,273069215898

%N Number of (n+2)X6 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order

%C Column 4 of A185477

%H R. H. Hardin, <a href="/A185472/b185472.txt">Table of n, a(n) for n = 1..200</a>

%F Empirical: a(n) = (1/27243216000)*n^15

%F + (97/21794572800)*n^14

%F + (1549/6227020800)*n^13

%F + (4127/479001600)*n^12

%F + (676031/2395008000)*n^11

%F + (54763/6220800)*n^10

%F + (60678553/304819200)*n^9

%F + (904333037/304819200)*n^8

%F + (910283537/31104000)*n^7

%F + (8446896821/43545600)*n^6

%F + (213392977159/239500800)*n^5

%F + (52396736149/17107200)*n^4

%F + (70560211894163/9081072000)*n^3

%F + (1840763445463/151351200)*n^2

%F + (1738288907/180180)*n

%F + 1019

%e Some solutions for 4X6

%e ..0..0..0..1..1..1....0..0..0..0..0..0....0..0..0..0..1..1....0..0..0..0..0..0

%e ..0..0..0..1..1..2....0..0..0..0..1..2....0..0..0..0..1..2....0..0..0..0..1..2

%e ..0..1..1..1..2..0....0..0..0..1..2..2....0..0..0..0..1..2....0..0..0..1..0..0

%e ..0..1..1..2..0..0....0..2..2..2..2..2....0..0..2..2..2..2....0..1..2..1..0..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 28 2011

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 August 13 11:30 EDT 2022. Contains 356091 sequences. (Running on oeis4.)