This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A203378 T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements 7
 12, 36, 36, 108, 164, 108, 324, 748, 748, 324, 972, 3412, 5208, 3412, 972, 2916, 15564, 36300, 36300, 15564, 2916, 8748, 70996, 253068, 387324, 253068, 70996, 8748, 26244, 323852, 1764360, 4136292, 4136292, 1764360, 323852, 26244, 78732, 1477268 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ....12......36......108........324..........972...........2916.............8748 ....36.....164......748.......3412........15564..........70996...........323852 ...108.....748.....5208......36300.......253068........1764360.........12301020 ...324....3412....36300.....387324......4136292.......44183028........471988172 ...972...15564...253068....4136292.....67731264.....1109832180......18189909480 ..2916...70996..1764360...44183028...1109832180....27913330472.....702420750924 ..8748..323852.12301020..471988172..18189909480...702420750924...27149753088792 .26244.1477268.85762188.5042151644.298154846436.17679917387404.1049837466171436 LINKS R. H. Hardin, Table of n, a(n) for n = 1..420 EXAMPLE Some solutions for n=4 k=3 ..0..0..1..0....1..0..1..1....1..1..0..0....1..1..1..1....1..0..0..0 ..0..1..1..1....0..1..1..0....1..1..1..0....1..1..0..1....0..1..0..0 ..1..0..1..1....0..0..1..1....1..0..1..1....0..1..1..1....1..0..1..0 ..1..1..0..1....1..0..0..1....0..1..1..1....1..1..0..1....1..1..1..1 ..1..1..1..1....0..1..0..0....0..0..1..1....1..0..0..0....1..1..0..1 CROSSREFS Column 1 is A003946(n+1) Column 2 is A147722(n+2) Sequence in context: A008653 A038006 A205967 * A073543 A074234 A076515 Adjacent sequences:  A203375 A203376 A203377 * A203379 A203380 A203381 KEYWORD nonn,tabl AUTHOR R. H. Hardin Dec 31 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .