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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A254264 Number of (5+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
236024, 888391, 2192422, 9308828, 35691048, 159041102, 742483152, 3525898989, 17473539574, 89203393842, 463194102932, 2440606864521, 12983765106408, 69479824462051, 373041068149038, 2009522674970372, 10836010416317362 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A254260

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +25*a(n-2) -76*a(n-3) -355*a(n-4) -445*a(n-5) +5359*a(n-6) +442*a(n-7) -4555*a(n-8) +20547*a(n-9) +116695*a(n-10) -743436*a(n-11) -3659657*a(n-12) +4254133*a(n-13) +23112497*a(n-14) +35937210*a(n-15) -95391932*a(n-16) -8699352*a(n-17) -44340768*a(n-18) -1513040060*a(n-19) -4349912524*a(n-20) +7932050968*a(n-21) +48766915088*a(n-22) +27878766496*a(n-23) -182157509312*a(n-24) -419273994368*a(n-25) +155621755904*a(n-26) +1437148924928*a(n-27) +1420501656576*a(n-28) -1893948786688*a(n-29) -4904596770816*a(n-30) -1855573876736*a(n-31) +5277141549056*a(n-32) +8179702071296*a(n-33) +3548181823488*a(n-34) -6025118482432*a(n-35) -12595931643904*a(n-36) -6205421387776*a(n-37) +7060445986816*a(n-38) +11119326396416*a(n-39) +4616016101376*a(n-40) -2503663943680*a(n-41) -6217636249600*a(n-42) -4083708592128*a(n-43) +1468878815232*a(n-44) +2834678415360*a(n-45) +309237645312*a(n-46) -618475290624*a(n-47) for n>58

EXAMPLE

Some solutions for n=1

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A132905 A100780 A104286 * A254257 A254303 A269280

Adjacent sequences:  A254261 A254262 A254263 * A254265 A254266 A254267

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 27 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 December 2 11:44 EST 2021. Contains 349440 sequences. (Running on oeis4.)