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

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A220328 T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..1 nXk array 11
 1, 1, 1, 2, 4, 1, 4, 16, 12, 1, 7, 48, 92, 37, 1, 12, 174, 572, 508, 114, 1, 21, 658, 4062, 6657, 2788, 351, 1, 37, 2482, 29467, 92093, 76627, 15316, 1081, 1, 65, 9229, 213225, 1335202, 2065264, 876714, 84196, 3329, 1, 114, 33982, 1540686, 18836493, 59893608 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Table starts .1.....1.......2.........4..........7.........12.........21........37 .1.....4......16........48........174........658.......2482......9229 .1....12......92.......572.......4062......29467.....213225...1540686 .1....37.....508......6657......92093....1335202...18836493.265346645 .1...114....2788.....76627....2065264...59893608.1653121774 .1...351...15316....876714...46094354.2680626797 .1..1081...84196..10004541.1026529800 .1..3329..462940.114058230 .1.10252.2545492 .1.31572 .1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..70 EXAMPLE Some solutions for n=3 k=4 ..0..0..0..0....0..0..0..0....0..1..0..0....0..0..0..0....0..1..1..1 ..0..0..0..0....1..1..0..0....1..0..1..0....1..1..1..1....0..0..1..1 ..1..0..1..0....1..1..0..0....1..0..1..0....0..1..1..0....0..0..0..0 CROSSREFS Column 2 is A099098 Row 1 is A005251(n+1) Sequence in context: A181332 A204021 A236471 * A220935 A221290 A078739 Adjacent sequences: A220325 A220326 A220327 * A220329 A220330 A220331 KEYWORD nonn,tabl AUTHOR R. H. Hardin Dec 10 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 10 12:10 EST 2023. Contains 367710 sequences. (Running on oeis4.)