The OEIS is supported by the many generous donors to the OEIS Foundation.

 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 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A237953 Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the upper median plus the lower median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1

%I #4 Feb 16 2014 06:17:50

%S 1280,7552,45504,300576,1989792,13448144,90873216,619311968,

%T 4216944960,28740190112,195754182912,1336638450880,9119759264640,

%U 62187152129600,423811971529728,2894195784272640,19749810069474816,134677433485842176

%N Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the upper median plus the lower median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

%C Column 2 of A237956

%H R. H. Hardin, <a href="/A237953/b237953.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2748*a(n-4) -1387988*a(n-8) +288215016*a(n-12) -28573068288*a(n-16) +1342200998400*a(n-20) -26806577111808*a(n-24) +258758317983744*a(n-28) -1294957173878784*a(n-32) +3352065764917248*a(n-36) -4028458590535680*a(n-40) +1526567264059392*a(n-44) for n>46

%e Some solutions for n=3

%e ..2..2..0....2..0..2....0..1..2....2..3..2....2..1..2....1..1..2....1..2..3

%e ..2..2..3....1..1..2....1..2..0....3..3..2....1..3..0....3..0..3....2..2..1

%e ..3..0..3....0..3..0....2..0..2....1..3..1....2..2..2....0..3..1....1..3..1

%e ..2..1..3....3..0..2....1..3..0....3..2..2....1..2..0....2..0..2....3..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 16 2014

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.

Last modified December 9 20:47 EST 2023. Contains 367695 sequences. (Running on oeis4.)