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!)
 A202931 T(n,k)=Number of nXk 0..2 arrays with adjacent row and column sums unequal 7
 3, 6, 6, 12, 52, 12, 24, 352, 352, 24, 48, 2444, 8460, 2444, 48, 96, 17508, 194636, 194636, 17508, 96, 192, 124340, 4439916, 14394092, 4439916, 124340, 192, 384, 872940, 100236532, 1032147416, 1032147416, 100236532, 872940, 384, 768, 6112832 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ....3........6..........12............24.............48.............96 ....6.......52.........352..........2444..........17508.........124340 ...12......352........8460........194636........4439916......100236532 ...24.....2444......194636......14394092.....1032147416....72961197604 ...48....17508.....4439916....1032147416...231197740500.50721408178292 ...96...124340...100236532...72961197604.50721408178292 ..192...872940..2247406834.5108912536716 ..384..6112832.50175952564 ..768.42822036 .1536 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 EXAMPLE Some solutions for n=4 k=3 ..0..0..1....0..2..1....0..2..1....0..2..0....0..1..2....1..0..2....0..2..1 ..1..1..1....1..1..2....1..2..2....2..0..1....0..0..0....2..1..1....2..2..1 ..2..0..2....0..2..0....2..1..0....2..2..2....0..1..1....0..2..0....0..1..1 ..1..0..2....2..2..2....0..0..1....0..2..0....2..1..1....0..1..0....0..1..2 CROSSREFS Diagonal is A202649 Sequence in context: A208445 A208796 A319867 * A240250 A239424 A119306 Adjacent sequences:  A202928 A202929 A202930 * A202932 A202933 A202934 KEYWORD nonn,tabl AUTHOR R. H. Hardin Dec 26 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 10 15:09 EST 2019. Contains 329896 sequences. (Running on oeis4.)