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

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A254843 Number of (n+2)X(6+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally and vertically 1
293012, 645882, 1102937, 2339906, 4446577, 8565304, 15676281, 28139328, 48596429, 82388048, 136361257, 223504512, 356863993, 570593176, 914443809, 1491899182, 2395605969, 3985181976, 6852332885, 12324434772, 21543373065 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A254845

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) -29*a(n-2) +64*a(n-3) -77*a(n-4) -56*a(n-5) +511*a(n-6) -1280*a(n-7) +1945*a(n-8) -1672*a(n-9) -379*a(n-10) +4032*a(n-11) -7559*a(n-12) +8728*a(n-13) -6355*a(n-14) +1280*a(n-15) +3836*a(n-16) -6496*a(n-17) +6188*a(n-18) -4096*a(n-19) +1856*a(n-20) -512*a(n-21) +64*a(n-22) for n>54

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A219318 A255761 A255754 * A318787 A158124 A050249

Adjacent sequences:  A254840 A254841 A254842 * A254844 A254845 A254846

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2015

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 20 11:06 EST 2020. Contains 331083 sequences. (Running on oeis4.)