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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A224127 Number of n X n 0..1 arrays with rows nondecreasing and antidiagonals unimodal. 1
 2, 9, 58, 419, 3149, 24095, 186348, 1452236, 11385356, 89697284, 709549769, 5632222541, 44837998135, 357848802839, 2862135963926, 22934807116783, 184082328044394, 1479641153930348, 11908495546392890, 95951907989239148 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A224133. LINKS R. H. Hardin, Table of n, a(n) for n = 1..22 EXAMPLE Some solutions for n=3: ..0..1..1....0..0..0....0..1..1....0..0..1....1..1..1....0..0..1....0..0..1 ..0..1..1....0..0..0....1..1..1....0..0..1....0..0..1....0..1..1....0..0..0 ..0..1..1....0..1..1....0..1..1....0..0..1....0..1..1....0..0..1....0..1..1 CROSSREFS Cf. A224133. Sequence in context: A141787 A047852 A240881 * A116867 A168358 A132608 Adjacent sequences:  A224124 A224125 A224126 * A224128 A224129 A224130 KEYWORD nonn AUTHOR R. H. Hardin, Mar 31 2013 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 May 26 21:56 EDT 2022. Contains 354092 sequences. (Running on oeis4.)