The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons 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 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A205019 Number of (n+1)X(n+1) 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards 0
 256, 27611, 7148335, 11646996582, 69845358912381, 2391551925319245318, 235682549037000868908322, 159301222429065945412750692320 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A205027 LINKS EXAMPLE Some solutions for n=4 ..0..0..1..0..3....2..3..1..1..0....1..0..1..3..2....3..2..1..1..2 ..1..0..1..0..0....0..0..0..0..0....1..0..0..0..0....1..0..0..0..0 ..0..0..3..0..1....0..2..3..3..1....0..0..0..0..0....3..0..2..3..1 ..1..0..2..0..3....0..1..2..3..2....0..3..2..2..0....0..0..2..3..3 ..3..0..1..0..3....0..0..1..3..3....0..0..0..3..3....0..0..0..0..3 CROSSREFS Sequence in context: A237134 A205948 A309827 * A017212 A181243 A205634 Adjacent sequences:  A205016 A205017 A205018 * A205020 A205021 A205022 KEYWORD nonn AUTHOR R. H. Hardin Jan 21 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 29 21:32 EST 2021. Contains 349416 sequences. (Running on oeis4.)