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!)
 A203397 T(n,k)=Number of nXk 0..3 arrays with every nonzero element less than or equal to some NW, E or S neighbor 8
 1, 1, 1, 1, 16, 1, 1, 185, 185, 1, 1, 1455, 7785, 1455, 1, 1, 10804, 210342, 210342, 10804, 1, 1, 83876, 5666072, 18530502, 5666072, 83876, 1, 1, 661595, 163500122, 1650100394, 1650100394, 163500122, 661595, 1, 1, 5187181, 4711784187 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Table starts .1.......1............1................1....................1 .1......16..........185.............1455................10804 .1.....185.........7785...........210342..............5666072 .1....1455.......210342.........18530502...........1650100394 .1...10804......5666072.......1650100394.........474618867194 .1...83876....163500122.....156174348536......146110498224967 .1..661595...4711784187...14710444493905....45159146324783578 .1.5187181.134023641768.1372836933907585.13840616100127064523 LINKS R. H. Hardin, Table of n, a(n) for n = 1..180 EXAMPLE Some solutions for n=4 k=3 ..0..3..0....1..1..3....1..2..1....1..1..2....3..0..3....0..2..1....1..2..1 ..0..3..1....2..0..3....1..2..1....0..1..2....3..1..3....1..3..1....1..2..2 ..1..3..3....2..3..3....1..2..0....0..2..2....3..3..3....0..3..1....0..3..0 ..3..3..3....1..3..3....1..2..2....2..2..2....2..2..3....0..3..3....0..3..3 CROSSREFS Sequence in context: A202750 A177823 A142462 * A173885 A173585 A022179 Adjacent sequences:  A203394 A203395 A203396 * A203398 A203399 A203400 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 01 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 December 10 14:27 EST 2019. Contains 329896 sequences. (Running on oeis4.)