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A250691 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction 17

%I #6 Feb 18 2015 07:35:03

%S 104,543,520,2541,2920,2512,11150,13906,15246,11736,47002,60508,74631,

%T 76320,53032,193117,249512,324648,383440,362241,233300,780551,995624,

%U 1315446,1670016,1848953,1647460,1005121,3122604,3894542,5098590,6671458

%N T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction

%C Table starts

%C ......104.......543.......2541.......11150.......47002......193117......780551

%C ......520......2920......13906.......60508......249512......995624.....3894542

%C .....2512.....15246......74631......324648.....1315446.....5098590....19218493

%C ....11736.....76320.....383440.....1670016.....6671458....25235016....92169818

%C ....53032....362241....1848953.....8038566....31728758...117793753...420283865

%C ...233300...1647460....8474002....36673634...143136866...523260542..1832718604

%C ..1005121...7249825...37322413...160222342...617657415..2224688673..7662909389

%C ..4260728..31113316..159438246...676640344..2571646112..9121206688.30911828018

%C .17835379.131014715..665575403..2784280670.10412478449.36332194553

%C .73930174.543845812.2731006288.11235235268.41269021168

%H R. H. Hardin, <a href="/A250691/b250691.txt">Table of n, a(n) for n = 1..112</a>

%F Empirical for column k:

%F k=1: [linear recurrence of order 7] for n>11

%F k=2: [order 13] for n>17

%F k=3: [same order 13] for n>17

%F k=4: [same order 13] for n>17

%F k=5: [same order 13] for n>17

%F k=6: [same order 13] for n>17

%F k=7: [same order 13] for n>17

%F Empirical for row n:

%F n=1: [linear recurrence of order 7, cf. A250692]

%F n=2: [order 10, cf. A250693]

%F n=3: [order 16, cf. A250694]

%F n=4: [same order 16, cf. A250695]

%F n=5: [same order 16, cf. A250696]

%F n=6: [same order 16, cf. A250697]

%F n=7: [same order 16, cf. A250698].

%e Some solutions for n=3 k=4

%e ..2..3..1..0..0....2..2..3..2..2....2..2..1..1..0....0..1..0..0..0

%e ..2..3..2..1..1....0..0..1..0..0....2..2..2..2..3....0..1..0..0..1

%e ..1..2..1..0..0....0..0..1..1..1....1..1..1..1..2....1..2..1..1..2

%e ..0..1..2..1..3....0..0..1..1..2....0..0..0..0..3....1..2..1..1..2

%Y Column 1 is A250669.

%Y Rows 1-7 are A250692, ..., A250698.

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Nov 26 2014

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Last modified August 28 02:34 EDT 2024. Contains 375477 sequences. (Running on oeis4.)