This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A198288 Number of 2nX4 0..3 arrays with values 0..3 introduced in row major order and each element equal to exactly one horizontal and vertical neighbor 1
 17, 2452, 413375, 72559212, 12940532183, 2322145946560, 417688220022251, 75197892524349728, 13542776983363615379, 2439305921057059368196, 439386062130801234903655, 79146996287674677581757652 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A198290 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 FORMULA Empirical: a(n) = 341*a(n-1) -38970*a(n-2) +2135218*a(n-3) -67448667*a(n-4) +1375490159*a(n-5) -19754442612*a(n-6) +216233988876*a(n-7) -1930500555319*a(n-8) +14641614117891*a(n-9) -95232147538058*a(n-10) +525211971434290*a(n-11) -2391181584630749*a(n-12) +8566626104248057*a(n-13) -21804187934100424*a(n-14) +26325592371676176*a(n-15) +62458261081740144*a(n-16) -409636534740954048*a(n-17) +948362811460747776*a(n-18) -580420633538230272*a(n-19) -2477378037254639616*a(n-20) +6262481237853487104*a(n-21) -5586587527536967680*a(n-22) +1769580684990480384*a(n-23) EXAMPLE Some solutions for n=3 ..0..0..1..1....0..0..1..1....0..0..1..1....0..1..0..2....0..1..0..0 ..1..1..2..2....1..1..0..2....1..1..0..0....0..1..0..2....0..1..2..2 ..2..2..1..1....3..3..0..2....2..3..1..1....3..3..2..3....3..3..0..0 ..0..0..2..2....0..2..1..1....2..3..0..0....1..1..2..3....0..0..3..3 ..3..3..0..0....0..2..3..2....1..2..3..3....2..3..3..2....1..2..1..0 ..1..1..3..3....1..1..3..2....1..2..0..0....2..0..0..2....1..2..1..0 CROSSREFS Sequence in context: A221322 A135505 A171704 * A092814 A198594 A138199 Adjacent sequences:  A198285 A198286 A198287 * A198289 A198290 A198291 KEYWORD nonn AUTHOR R. H. Hardin Oct 23 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified May 24 09:20 EDT 2013. Contains 225617 sequences.