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A214608 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 9, n >= 2. 0

%I #4 Jul 23 2012 12:49:15

%S 304,310,314,334,334,4137,4754,4811,4929,4920,4610,5260,4738,4784,

%T 4924,50775,66474,72137,71469,69764,65977,63790,55400,55907,57274,

%U 676474,969677,1118226,1096104,1058044,1003962,946620,864012,870946,884912,1154902,887242,651592,669896,710904

%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 9, 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 5 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......11......12......13......14......15

%C .n

%C .2......304.....310.....314.....334.....334

%C .3.....4137....4754....4811....4929....4920....4610....5260....4738....4784....4924

%C .4....50775...66474...72137...71469...69764...65977...63790...55400...55907...57274

%C .5...676474..969677.1118226.1096104.1058044.1003962..946620..864012..870946..884912.1154902..887242..651592..669896..710904

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

%C For each n, the maximum value of k is 5*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 4 5 6 7 8

%e 9 10 11 12 13 14 15 16 17

%e NT 304 310 314 334 334 334 314 310 304

%e 304 310 314 334 334 334 314 310 304

%e To limit duplication, only the top left-hand corner 304 and the 310, 314, 334, 334 to its right are stored in the sequence,

%e i.e. T(2,1) = 304, T(2,2) = 310, T(2,3) = 314, T(2,4) = 334 and T(2,5) = 334.

%Y Cf. A213106, A213249, A213426, A214042, A214376, A214397, A214399, A214504, A214510, A214563, A214601, A214503, A214605

%K nonn,tabf

%O 2,1

%A _Christopher Hunt Gribble_, Jul 22 2012

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)