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!)
A256766 Number of (n+2)X(3+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum 1
9152, 81796, 475904, 2768896, 13278720, 63680400, 277704000, 1211040000, 5037021600, 20950246564, 85158087248, 346148662336, 1392238414592, 5599697511424, 22422624104192, 89785934095936, 358953258998256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A256771

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) +36*a(n-2) -434*a(n-3) -293*a(n-4) +10602*a(n-5) -7308*a(n-6) -154260*a(n-7) +228465*a(n-8) +1487700*a(n-9) -3131964*a(n-10) -9978138*a(n-11) +27428457*a(n-12) +47114850*a(n-13) -170182908*a(n-14) -151549536*a(n-15) +783764700*a(n-16) +279527832*a(n-17) -2745078624*a(n-18) +60117408*a(n-19) +7400681712*a(n-20) -2312412192*a(n-21) -15409556928*a(n-22) +8541174528*a(n-23) +24660582720*a(n-24) -19139776896*a(n-25) -29880981504*a(n-26) +30120950784*a(n-27) +26559178752*a(n-28) -34513588224*a(n-29) -16160882688*a(n-30) +28802875392*a(n-31) +5486100480*a(n-32) -17101062144*a(n-33) +143917056*a(n-34) +6853754880*a(n-35) -1077936128*a(n-36) -1663041536*a(n-37) +452984832*a(n-38) +184549376*a(n-39) -67108864*a(n-40)

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Cf. A256771

Sequence in context: A253031 A093213 A205922 * A210140 A232759 A250149

Adjacent sequences:  A256763 A256764 A256765 * A256767 A256768 A256769

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 09 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 23 21:56 EST 2022. Contains 350515 sequences. (Running on oeis4.)