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!)
 A209684 T(n,k)=Number of n X n 0..k arrays with every element equal to a diagonal or antidiagonal reflection, and new values 0 upwards introduced in row major order 8
 1, 1, 8, 1, 14, 96, 1, 15, 608, 4608, 1, 15, 1243, 246038, 331776, 1, 15, 1508, 2143147, 166075313, 95551488, 1, 15, 1549, 6716352, 6713848491, 1008907523438, 41278242816, 1, 15, 1551, 11315839, 66825091608, 336865786047147 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Table starts ......1.........1..........1...........1............1............1............1 ......8........14.........15..........15...........15...........15...........15 .....96.......608.......1243........1508.........1549.........1551.........1551 ...4608....246038....2143147.....6716352.....11315839.....13575355.....14164693 .331776.166075313.6713848491.66825091608.268997909000.584728215424.847881355388 LINKS R. H. Hardin, Table of n, a(n) for n = 1..988 EXAMPLE Some solutions for n=3 k=3 ..0..1..0....0..0..1....0..1..0....0..0..1....0..1..0....0..1..0....0..1..1 ..1..2..3....0..1..1....1..1..1....2..2..0....0..1..1....2..3..1....1..0..2 ..2..3..1....2..1..0....1..1..1....3..2..0....0..0..1....2..2..1....3..2..1 CROSSREFS Column 1 is A209586/2 Sequence in context: A124906 A298143 A181762 * A173988 A349123 A158893 Adjacent sequences:  A209681 A209682 A209683 * A209685 A209686 A209687 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 11 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 November 27 12:51 EST 2021. Contains 349394 sequences. (Running on oeis4.)