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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A269646 T(n,k)=Number of nXk arrays containing k copies of 0..n-1 avoiding the pattern down-up in every row and equal-up in every column. 4
 1, 1, 2, 1, 6, 6, 1, 14, 74, 24, 1, 34, 574, 1880, 120, 1, 92, 4564, 68876, 80316, 720, 1, 258, 41526, 2316638, 18375702, 5141864, 5040, 1, 722, 419516, 94747953, 3291772332, 9213264418, 458608016, 40320, 1, 2022, 4351224, 4581555620 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Table starts ......1...........1.............1..............1............1..........1 ......2...........6............14.............34...........92........258 ......6..........74...........574...........4564........41526.....419516 .....24........1880.........68876........2316638.....94747953.4581555620 ....120.......80316......18375702.....3291772332.740782304804 ....720.....5141864....9213264418.10673009972228 ...5040...458608016.7725775442284 ..40320.54247835568 .362880 LINKS R. H. Hardin, Table of n, a(n) for n = 1..49 EXAMPLE Some solutions for n=3 k=4 ..1..1..0..0. .1..1..2..1. .0..2..2..2. .0..1..2..2. .2..2..1..1 ..2..2..2..1. .2..0..0..2. .1..2..1..1. .1..2..1..0. .1..0..0..2 ..2..0..0..1. .2..1..0..0. .1..0..0..0. .2..1..0..0. .1..2..0..0 CROSSREFS Column 1 is A000142. Column 2 is A269334. Row 2 is A269506. Sequence in context: A089231 A052296 A019538 * A269336 A300700 A046521 Adjacent sequences:  A269643 A269644 A269645 * A269647 A269648 A269649 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Mar 02 2016 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 January 27 15:07 EST 2022. Contains 350607 sequences. (Running on oeis4.)