The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A264954 T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with no equal horizontal or vertical neighbors. 6
 1, 0, 2, 0, 2, 6, 0, 2, 12, 24, 0, 2, 36, 504, 120, 0, 2, 114, 10728, 22320, 720, 0, 2, 420, 269352, 4857120, 1521360, 5040, 0, 2, 1584, 7340712, 1286876160, 4099655520, 140394240, 40320, 0, 2, 6228, 212706840, 378296480400, 13998666435840 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Table starts .......1.............0.................0..................0.................0 .......2.............2.................2..................2.................2 .......6............12................36................114...............420 ......24...........504.............10728.............269352...........7340712 .....120.........22320...........4857120.........1286876160......378296480400 .....720.......1521360........4099655520.....13998666435840.54517360458428640 ....5040.....140394240.....5589688315680.292785244605453600 ...40320...17034433920.11532215497783680 ..362880.2627788262400 .3628800 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 EXAMPLE Some solutions for n=3 k=4 ..2..0..2..1....0..2..1..0....0..2..1..2....0..2..0..1....2..1..2..0 ..0..2..1..0....1..0..2..1....2..1..0..1....2..0..1..2....1..2..0..1 ..1..0..2..1....0..2..1..2....0..2..1..0....0..1..2..1....0..1..2..0 CROSSREFS Column 1 is A000142. Sequence in context: A033733 A115951 A057607 * A212085 A265882 A324253 Adjacent sequences:  A264951 A264952 A264953 * A264955 A264956 A264957 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Nov 29 2015 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 September 19 17:35 EDT 2021. Contains 347564 sequences. (Running on oeis4.)