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A270515 Number of 7X7X7 triangular 0..n arrays with some element plus some adjacent element totalling n+1 exactly once. 0

%I

%S 230247,12072484260,35714928884139,44967908021958960,

%T 13296639688401609639,2109167396478578514420,150198194895042488122251,

%U 6905544217424668588435776,196451622904453301728770183

%N Number of 7X7X7 triangular 0..n arrays with some element plus some adjacent element totalling n+1 exactly once.

%C Row 7 of A270509.

%e Some solutions for n=1

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

%e .......0.0............0.0............0.0............0.0............0.0

%e ......0.0.1..........1.0.0..........1.0.0..........1.0.1..........0.0.0

%e .....1.0.0.1........0.1.0.1........0.1.0.0........0.0.0.0........0.1.0.1

%e ....0.0.1.0.0......1.0.0.0.0......0.0.0.0.1......0.1.0.1.0......0.0.0.0.0

%e ...0.0.0.0.0.0....0.0.0.0.0.0....0.1.0.0.0.0....0.0.1.0.0.0....0.0.0.0.0.1

%e ..1.0.1.0.0.0.1..0.0.0.0.1.0.1..1.0.0.0.1.0.1..0.1.0.0.0.0.0..0.0.0.0.0.1.0

%Y Cf. A270509.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 18 2016

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Last modified February 2 12:13 EST 2023. Contains 360011 sequences. (Running on oeis4.)