This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A234874 Number of (n+1)X(n+1) 0..4 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant stress tilted 1X1 tilings) 0
 32, 148, 472, 3336, 12208, 261384, 1035792, 98517200, 394703128, 170944136648, 684393189840, 1274659858736120, 5100387102322576 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A234882 LINKS EXAMPLE Some solutions for n=4 ..1..0..2..0..2....2..0..2..1..2....1..0..1..0..1....2..0..1..0..1 ..3..1..4..3..4....4..3..4..2..4....3..1..3..1..3....3..2..4..2..4 ..1..0..2..0..2....3..1..3..0..3....1..0..1..0..1....2..0..1..0..1 ..3..1..4..3..4....4..3..4..2..4....4..2..4..2..4....3..2..4..2..4 ..1..0..2..0..2....2..0..2..1..2....1..0..3..0..3....2..0..1..0..3 CROSSREFS Sequence in context: A097199 A100165 A100173 * A220975 A100172 A234132 Adjacent sequences:  A234871 A234872 A234873 * A234875 A234876 A234877 KEYWORD nonn AUTHOR R. H. Hardin, Jan 01 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 11 21:00 EST 2019. Contains 329937 sequences. (Running on oeis4.)