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!)
A238251 Number of (n+1)X(4+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise 2
286, 2818, 43456, 523578, 6683137, 65450601, 640472606, 5080416791, 40066932588, 267891545518, 1781590953402, 10371478598345, 60084341166190, 311815187891138, 1610762741432521, 7583058204030841, 35540971632237331 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A238255

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A241616 A204035 A235409 * A027798 A072817 A117994

Adjacent sequences:  A238248 A238249 A238250 * A238252 A238253 A238254

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 21 2014

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 16 11:35 EDT 2022. Contains 353704 sequences. (Running on oeis4.)