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!)
 A299661 T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 7
 1, 2, 2, 4, 8, 4, 8, 32, 32, 8, 16, 128, 227, 128, 16, 32, 512, 1642, 1642, 512, 32, 64, 2048, 11888, 22087, 11888, 2048, 64, 128, 8192, 86123, 297071, 297071, 86123, 8192, 128, 256, 32768, 624007, 4001253, 7411398, 4001253, 624007, 32768, 256, 512, 131072 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ...1......2........4..........8............16..............32 ...2......8.......32........128...........512............2048 ...4.....32......227.......1642.........11888...........86123 ...8....128.....1642......22087........297071.........4001253 ..16....512....11888.....297071.......7411398.......185302633 ..32...2048....86123....4001253.....185302633......8607101770 ..64...8192...624007...53909088....4634931975....400012077773 .128..32768..4521433..726363190..115940148451..18591844096646 .256.131072.32761769.9787119222.2900256951630.864147943636240 LINKS R. H. Hardin, Table of n, a(n) for n = 1..180 FORMULA Empirical for column k: k=1: a(n) = 2*a(n-1) k=2: a(n) = 4*a(n-1) k=3: [order 8] k=4: [order 24] k=5: [order 89] EXAMPLE Some solutions for n=5 k=5 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 ..0..0..0..0..0. .0..0..1..1..0. .0..0..1..1..0. .0..1..0..0..0 ..1..0..0..1..0. .1..1..1..1..0. .0..0..0..1..0. .0..0..1..1..1 ..1..1..0..1..0. .1..1..0..0..0. .0..1..1..1..1. .0..1..1..0..0 ..1..1..0..1..1. .0..0..0..1..0. .0..0..0..1..0. .0..0..1..1..1 CROSSREFS Column 1 is A000079(n-1). Column 2 is A004171(n-1). Sequence in context: A316960 A299740 A316815 * A320371 A317565 A302741 Adjacent sequences:  A299658 A299659 A299660 * A299662 A299663 A299664 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Feb 15 2018 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 September 28 17:43 EDT 2020. Contains 337393 sequences. (Running on oeis4.)