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!)
A237083 Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the upper median plus the lower median minus the minimum of every 2X2 subblock equal 1
256, 912, 3274, 12590, 48864, 194812, 782024, 3181960, 13011114, 53658914, 222083940, 924917700, 3861987068, 16205498580, 68129054026, 287586729590, 1215649311224, 5156290702428, 21893593896096, 93233390148624 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A237090

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) +60*a(n-2) -862*a(n-3) -1086*a(n-4) +33540*a(n-5) -9979*a(n-6) -783892*a(n-7) +824284*a(n-8) +12345350*a(n-9) -18192256*a(n-10) -139180992*a(n-11) +238967360*a(n-12) +1163655888*a(n-13) -2146002000*a(n-14) -7367091744*a(n-15) +13887606400*a(n-16) +35709999776*a(n-17) -66295608704*a(n-18) -132969450624*a(n-19) +235472001792*a(n-20) +379020082688*a(n-21) -621655478784*a(n-22) -818785156096*a(n-23) +1209529808896*a(n-24) +1318846520320*a(n-25) -1708239130624*a(n-26) -1549680926720*a(n-27) +1713440202752*a(n-28) +1294797701120*a(n-29) -1184941342720*a(n-30) -748816367616*a(n-31) +542383144960*a(n-32) +290968829952*a(n-33) -154773487616*a(n-34) -72499593216*a(n-35) +24714936320*a(n-36) +10489954304*a(n-37) -1677721600*a(n-38) -671088640*a(n-39)

EXAMPLE

Some solutions for n=5

..1..0....3..2....2..2....2..3....3..1....2..0....2..2....3..3....2..3....0..2

..2..2....1..1....0..1....3..2....3..1....2..3....3..1....2..2....3..1....0..2

..1..2....3..0....1..3....3..2....1..3....3..3....3..1....1..3....3..2....2..0

..1..3....2..0....0..1....3..2....0..2....0..1....1..3....1..3....1..3....1..1

..2..1....2..1....3..1....2..1....3..1....3..3....0..2....2..2....3..0....0..2

..1..3....0..2....1..0....3..2....2..0....2..1....2..2....1..3....2..2....2..0

CROSSREFS

Sequence in context: A224975 A237090 A224968 * A220764 A135272 A205595

Adjacent sequences:  A237080 A237081 A237082 * A237084 A237085 A237086

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 03 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 July 2 21:48 EDT 2022. Contains 355029 sequences. (Running on oeis4.)