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A271339 T(n,k)=Number of nXnXn triangular 0..k arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal. 7

%I #4 Apr 04 2016 13:43:07

%S 0,0,1,0,1,15,0,1,33,207,0,1,36,3798,3283,0,1,36,12195,960152,64650,0,

%T 1,36,18054,15971570,577747260,1640007,0,1,36,19620,71737645,

%U 71014748334,859484671068,54704700,0,1,36,19788,150055420,1362466441524

%N T(n,k)=Number of nXnXn triangular 0..k arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.

%C Table starts

%C .......0............0................0..................0...................0

%C .......1............1................1..................1...................1

%C ......15...........33...............36.................36..................36

%C .....207.........3798............12195..............18054...............19620

%C ....3283.......960152.........15971570...........71737645...........150055420

%C ...64650....577747260......71014748334......1362466441524.......8655860751612

%C .1640007.859484671068.1103274718331139.116575962939900339.2853581910745313142

%H R. H. Hardin, <a href="/A271339/b271339.txt">Table of n, a(n) for n = 1..86</a>

%e Some solutions for n=4 k=4

%e .....0........0........0........0........0........0........0........0

%e ....0.0......1.2......0.0......0.1......1.2......1.2......1.0......1.2

%e ...1.1.1....1.1.1....0.1.1....1.2.0....1.1.3....0.2.2....0.1.2....1.2.2

%e ..2.3.4.3..2.0.2.2..2.1.0.0..3.2.2.0..2.4.0.3..2.3.3.0..0.0.1.2..0.0.3.2

%K nonn,tabl

%O 1,6

%A _R. H. Hardin_, Apr 04 2016

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Last modified August 25 13:13 EDT 2024. Contains 375439 sequences. (Running on oeis4.)