This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A207928 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 1 1 vertically 11
 2, 4, 4, 6, 16, 6, 9, 36, 36, 10, 15, 81, 72, 100, 16, 25, 225, 144, 240, 256, 26, 40, 625, 360, 576, 704, 676, 42, 64, 1600, 900, 1872, 1936, 2080, 1764, 68, 104, 4096, 2160, 6084, 7744, 6400, 6216, 4624, 110, 169, 10816, 5184, 18096, 30976, 29760, 21904 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ..2....4.....6.....9.....15......25.......40........64.......104........169 ..4...16....36....81....225.....625.....1600......4096.....10816......28561 ..6...36....72...144....360.....900.....2160......5184.....12528......30276 .10..100...240...576...1872....6084....18096.....53824....165648.....509796 .16..256...704..1936...7744...30976...111584....401956...1513992....5702544 .26..676..2080..6400..29760..138384...592968...2540836..11151624...48944016 .42.1764..6216.21904.126688..732736..3773248..19430464.105642128..574369156 .68.4624.18496.73984.520608.3663396.22906752.143233024.955190016.6369955344 LINKS R. H. Hardin, Table of n, a(n) for n = 1..391 EXAMPLE Some solutions for n=9 k=3 ..0..0..1....0..0..1....0..1..1....1..0..0....1..0..0....0..0..1....0..0..1 ..0..1..1....1..1..1....0..0..1....1..0..0....0..0..1....1..1..1....0..0..1 ..1..1..0....1..0..0....1..0..0....0..1..1....1..1..0....1..1..0....1..1..0 ..1..0..0....0..1..1....0..1..1....0..0..1....0..1..1....0..0..1....0..1..1 ..0..1..1....1..1..0....1..1..1....1..1..0....0..0..1....1..0..1....1..0..0 ..0..1..1....0..0..1....1..0..0....1..0..0....1..1..0....1..1..0....0..1..1 ..1..0..0....1..0..0....0..1..1....0..1..1....0..1..1....0..1..1....1..0..1 ..1..1..0....1..1..1....1..1..1....1..0..0....0..0..1....0..0..1....1..0..0 ..0..1..1....0..1..1....1..0..0....1..1..1....1..0..0....1..1..0....0..1..1 CROSSREFS Column 1 is A006355(n+2) Column 2 is A206981 Column 3 is A207840 Row 1 is A006498(n+2) Row 2 is A189145(n+2) Sequence in context: A207918 A207519 A208698 * A207858 A208379 A207453 Adjacent sequences:  A207925 A207926 A207927 * A207929 A207930 A207931 KEYWORD nonn,tabl AUTHOR R. H. Hardin Feb 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 December 13 22:55 EST 2019. Contains 329974 sequences. (Running on oeis4.)