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 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A204077 Number of n X n 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1 0
 0, 4, 132, 11236, 13346532, 94591923364, 4337212764978412, 1473512792354952891844 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A204084 LINKS EXAMPLE Some solutions for n=5 ..3..0..0..0..1....3..0..0..0..1....1..1..0..1..2....1..0..2..0..0 ..1..1..1..1..1....1..1..1..1..1....0..2..0..1..0....1..0..1..1..1 ..0..2..1..1..0....0..3..3..0..0....0..0..3..2..0....0..3..3..1..2 ..0..0..0..0..0....0..2..3..1..1....1..1..1..0..1....0..1..0..0..0 ..1..1..3..1..1....1..1..0..0..1....3..0..0..0..1....2..1..0..1..1 CROSSREFS Sequence in context: A252172 A192837 A338040 * A194537 A194538 A194539 Adjacent sequences: A204074 A204075 A204076 * A204078 A204079 A204080 KEYWORD nonn AUTHOR R. H. Hardin Jan 10 2012 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.

Last modified December 5 04:50 EST 2022. Contains 358578 sequences. (Running on oeis4.)