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A214510 Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths incorporating each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 4, n >= 2. 5

%I #8 Jul 23 2012 12:47:29

%S 23,24,80,86,88,100,264,303,303,282,820,1008,1007,907,1058,776,2401,

%T 3043,3013,2844,3312,2375,6751,8651,8562,8317,9411,7116,9718,6882,

%U 18630,24035,23979,23261,26077,20216,26479,20016,50775,65977,66474,63790,72137,55400,71469,55907,69764,57274

%N Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths incorporating each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 4, n >= 2.

%C The subset of nodes is contained in the top left-hand quarter of the rectangle and has nodal dimensions floor((n+1)/2) and 2 to capture all geometrically distinct counts.

%C The quarter-rectangle is read by rows.

%C The irregular array of numbers is:

%C ...k.....1.....2.....3.....4.....5.....6.....7.....8.....9....10

%C .n

%C .2......23....24

%C .3......80....86....88...100

%C .4.....264...303...303...282

%C .5.....820..1008..1007...907..1058...776

%C .6....2401..3043..3013..2844..3312..2375

%C .7....6751..8651..8562..8317..9411..7116..9718..6882

%C .8...18630.24035.23979.23261.26077.20216.26479.20016

%C .9...50775.65977.66474.63790.72137.55400.71469.55907.69764.57274

%C where k indicates the position of a node in the quarter-rectangle.

%C For each n, the maximum value of k is 2*floor((n+1)/2).

%C Reading this array by rows gives the sequence.

%H C. H. Gribble, <a href="https://oeis.org/wiki/Complete_non-self-adjacent_paths:Results_for_Square_Lattice">Computed characteristics of complete non-self-adjacent paths in a square lattice bounded by various sizes of rectangle.</a>

%H C. H. Gribble, <a href="https://oeis.org/wiki/Complete non-self-adjacent paths:Program">Computes characteristics of complete non-self-adjacent paths in square and cubic lattices bounded by various sizes of rectangle and rectangular cuboid respectively.</a>

%e When n = 2, the number of times (NT) each node in the rectangle (N) occurs in a complete non-self-adjacent simple path is

%e N 0 1 2 3

%e 4 5 6 7

%e NT 23 24 24 23

%e 23 24 24 23

%e To limit duplication, only the top left-hand corner 23 and the 24 to its right are stored in the sequence,

%e i.e. T(2,1) = 23 and T(2,2) = 24.

%Y Cf. A213106, A213249, A213342, A214022, A214122, A214397, A214399, A214504

%K nonn,tabf

%O 2,1

%A _Christopher Hunt Gribble_, Jul 19 2012

%E Comment corrected by _Christopher Hunt Gribble_, Jul 22 2012

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Last modified September 14 16:47 EDT 2024. Contains 375929 sequences. (Running on oeis4.)