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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A183253 T(n,k)=Half the number of nXk binary arrays with the number of 1-1 adjacencies equal to the number of 0-0 adjacencies 7
 1, 1, 1, 1, 3, 1, 2, 6, 6, 2, 3, 18, 25, 18, 3, 6, 60, 164, 164, 60, 6, 10, 210, 1092, 2101, 1092, 210, 10, 20, 756, 7954, 29100, 29100, 7954, 756, 20, 35, 2772, 57519, 417190, 807261, 417190, 57519, 2772, 35, 70, 10296, 429936, 6104168, 23226996, 23226996 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Table starts ..1.....1........1...........2..............3.................6 ..1.....3........6..........18.............60...............210 ..1.....6.......25.........164...........1092..............7954 ..2....18......164........2101..........29100............417190 ..3....60.....1092.......29100.........807261..........23226996 ..6...210.....7954......417190.......23226996........1333831052 .10...756....57519.....6104168......679637064.......78105333988 .20..2772...429936....90554742....20179029954.....4635786110412 .35.10296..3205504..1356933444...604725622404...277890240523800 .70.38610.24288784.20489622108.18266061977928.16785123061670988 LINKS R. H. Hardin, Table of n, a(n) for n = 1..3000 EXAMPLE Some solutions with a(1,1)=0 for 4X6 ..0..0..0..0..0..1....0..0..0..0..1..1....0..0..0..0..1..0....0..0..0..1..0..1 ..1..1..1..0..1..0....1..1..0..1..1..1....0..0..0..1..1..1....0..0..1..1..1..1 ..0..1..1..1..1..1....1..1..0..0..0..0....1..0..1..0..0..1....0..1..1..0..1..1 ..0..0..0..0..0..1....1..1..0..0..1..0....1..1..1..1..1..0....0..1..0..0..0..0 CROSSREFS Column 1 is A001405(n-2) Column 2 is 3*A000984(n-2) Sequence in context: A318214 A318552 A183289 * A201675 A279859 A201655 Adjacent sequences:  A183250 A183251 A183252 * A183254 A183255 A183256 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 03 2011 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 August 9 21:08 EDT 2022. Contains 356026 sequences. (Running on oeis4.)