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!)
A253307 Number of (n+1)X(1+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum unequal to its neighbors horizontally, vertically, diagonally and antidiagonally 3
81, 518, 3550, 23524, 157476, 1051870, 7027770, 46953514, 313711862, 2095963398, 14003608312, 93561234452, 625103107952, 4176451826546, 27903796991886, 186431421801416, 1245589462955974, 8322058035168122, 55601505834527494 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A253314
LINKS
FORMULA
Empirical: a(n) = 3*a(n-1) +14*a(n-2) +57*a(n-3) +79*a(n-4) +73*a(n-5) +99*a(n-6) -14*a(n-7) +48*a(n-8) -24*a(n-9) +32*a(n-10) for n>11
EXAMPLE
Some solutions for n=4
..1..0....2..2....1..1....2..2....1..1....2..1....2..0....2..2....1..0....0..2
..1..2....0..1....2..0....1..1....0..0....2..1....1..1....1..0....2..1....0..2
..0..2....2..1....1..1....0..2....2..0....1..0....1..0....0..1....1..2....2..1
..2..1....1..2....0..0....2..1....0..1....2..0....1..2....2..0....2..1....0..2
..1..2....0..2....1..2....1..2....0..2....2..1....0..0....1..1....2..2....0..2
CROSSREFS
Sequence in context: A253731 A236658 A236641 * A235784 A235565 A235560
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 30 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 April 16 05:35 EDT 2024. Contains 371697 sequences. (Running on oeis4.)