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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A264184 Number of (n+1)X(2+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 1,-1 or 2,2. 1
 4, 24, 81, 375, 1600, 6656, 28561, 120393, 509796, 2161720, 9150625, 38773295, 164249856, 695734272, 2947295521, 12484753489, 52886200900, 224030247000, 949005240561, 4020054131751, 17029223715904, 72136936615424 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A264190. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 4*a(n-1) +a(n-2) -17*a(n-4) +68*a(n-5) +17*a(n-6) +17*a(n-8) -68*a(n-9) -17*a(n-10) +a(n-12) -4*a(n-13) -a(n-14) EXAMPLE Some solutions for n=4 ..0..1..2....8..3..4....8..1..2....0..3..4....0..3..4....8..1..4....8..3..2 ..3..6..5....1..2..5....3..6..5....1..2..5....1..2..5...11..2..5....1..6..5 ..4..9..8...14..7..0....4..9..0....6..9..8....6..7..8...14..7..0....4..7..0 ..7.10.13....9.10.11....7.12.11....7.10.11....9.12.11....9.10..3....9.12.11 .12.11.14...12.13..6...10.13.14...12.13.14...10.13.14...12.13..6...10.13.14 CROSSREFS Cf. A264190. Sequence in context: A158494 A209456 A069145 * A211071 A212135 A210569 Adjacent sequences:  A264181 A264182 A264183 * A264185 A264186 A264187 KEYWORD nonn AUTHOR R. H. Hardin, Nov 06 2015 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 January 24 18:36 EST 2022. Contains 350565 sequences. (Running on oeis4.)