This site is supported by donations to The OEIS Foundation.

 Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS". Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A189350 Number of nX4 array permutations with each element moving one space diagonally, horizontally or vertically 1
 1, 45, 557, 12592, 237297, 4791913, 94635005, 1883785285, 37399042560, 743166198493, 14763119513829, 293302192368977, 5826899299462793, 115761639593312944, 2299800733947890517, 45689485687194056453 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 4 of A189355 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 FORMULA Empirical: a(n) = 8*a(n-1) +268*a(n-2) +100*a(n-3) -14506*a(n-4) -22855*a(n-5) +347444*a(n-6) +727264*a(n-7) -4361775*a(n-8) -10839894*a(n-9) +28941588*a(n-10) +87051904*a(n-11) -86750184*a(n-12) -379741329*a(n-13) +15880784*a(n-14) +854458520*a(n-15) +430764327*a(n-16) -969033120*a(n-17) -802207572*a(n-18) +802207572*a(n-19) +969033120*a(n-20) -430764327*a(n-21) -854458520*a(n-22) -15880784*a(n-23) +379741329*a(n-24) +86750184*a(n-25) -87051904*a(n-26) -28941588*a(n-27) +10839894*a(n-28) +4361775*a(n-29) -727264*a(n-30) -347444*a(n-31) +22855*a(n-32) +14506*a(n-33) -100*a(n-34) -268*a(n-35) -8*a(n-36) +a(n-37) EXAMPLE Some solutions for 3X4 ..4..0..3..7....4..5..3..7....4..2..3..7....5..6..1..2....4..2..3..7 ..8..1..5..2....0..6..1..2....5..0..1.11....0..9.10..3....0.10..1.11 ..9.10.11..6....9..8.11.10....9..8..6.10....4..8.11..7....9..8..5..6 CROSSREFS Sequence in context: A027783 A160837 A160838 * A090024 A282767 A160234 Adjacent sequences:  A189347 A189348 A189349 * A189351 A189352 A189353 KEYWORD nonn AUTHOR R. H. Hardin Apr 20 2011 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.