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A278729 Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake. 1

%I #4 Nov 27 2016 07:13:40

%S 40,1947,58904,1410818,28637916,506031118,7907770636,110655824716,

%T 1401584381570,16222274394016,173007912264684,1712497545142699,

%U 15831976807688826,137451501603516285,1125976516897709842

%N Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

%C Column 3 of A278734.

%H R. H. Hardin, <a href="/A278729/b278729.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A278729/a278729_1.txt">Empirical polynomial of degree 109</a>

%F Empirical polynomial of degree 109 (see link above)

%e Some solutions for n=3

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

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

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

%Y Cf. A278734.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 27 2016

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)