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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A277767 T(n,k)=Number of nXk 0..2 arrays with every element equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0) both plus 1 mod 3 and minus 1 mod 3, with new values introduced in order 0..2. 12
 0, 0, 0, 0, 1, 0, 0, 4, 2, 0, 0, 18, 17, 14, 0, 0, 80, 204, 330, 56, 0, 0, 356, 1989, 9741, 3666, 284, 0, 0, 1584, 21141, 275018, 270291, 46289, 1304, 0, 0, 7048, 220549, 7824415, 20049229, 8971150, 560809, 6248, 0, 0, 31360, 2292380, 221983169, 1487830718 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,8 COMMENTS Table starts .0......0..........0.............0.................0...................0 .0......1..........4............18................80.................356 .0......2.........17...........204..............1989...............21141 .0.....14........330..........9741............275018.............7824415 .0.....56.......3666........270291..........20049229..........1487830718 .0....284......46289.......8971150........1762881313........343944986355 .0...1304.....560809.....280603511......145416104585......74591651561541 .0...6248....6883464....8946059000....12253138042478...16513537201433122 .0..29408...84161576..283436060320..1025207978301185.3631417278822015869 .0.139472.1030163755.8998418743638.85977721285058269 LINKS R. H. Hardin, Table of n, a(n) for n = 1..112 FORMULA Empirical for column k: k=2: a(n) = 4*a(n-1) +6*a(n-2) -12*a(n-3) k=3: [order 11] k=4: [order 44] for n>45 Empirical for row n: n=2: a(n) = 4*a(n-1) +2*a(n-2) n=3: [order 18] n=4: [order 98] EXAMPLE Some solutions for n=4 k=4 ..0..1..2..0. .0..1..2..0. .0..1..2..0. .0..1..2..0. .0..1..2..0 ..2..1..1..1. .2..0..0..1. .2..2..0..1. .2..0..1..1. .2..2..1..1 ..2..0..2..0. .0..1..0..2. .1..0..0..1. .0..1..2..0. .1..0..2..0 ..1..2..1..0. .2..2..1..2. .2..1..2..2. .1..2..1..1. .2..0..1..2 CROSSREFS Row 2 is A090017(n-1). Sequence in context: A232833 A256269 A256279 * A107088 A137986 A330768 Adjacent sequences:  A277764 A277765 A277766 * A277768 A277769 A277770 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Oct 29 2016 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 May 24 07:11 EDT 2022. Contains 354005 sequences. (Running on oeis4.)