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 A270612 Number of 7X7X7 triangular 0..n arrays with some element plus some adjacent element totalling n+1 or n-1 exactly once. 0
 0, 0, 8708857332, 98204118828408, 9214293422949066, 4757551848002860896, 285369749616515150016, 32625021173112501378696, 1060574342507074466039772, 42481155976455567861014856 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Row 7 of A270606. LINKS Table of n, a(n) for n=1..10. EXAMPLE Some solutions for n=3 ........0..............3..............3..............0..............0 .......3.3............1.0............3.0............3.3............0.0 ......0.0.3..........0.0.0..........0.0.0..........0.0.3..........0.3.0 .....0.0.3.0........0.0.1.0........0.0.0.0........0.0.3.3........0.0.3.2 ....0.0.0.3.3......0.0.0.0.0......0.0.0.3.3......0.0.0.0.2......0.0.0.3.3 ...0.0.0.0.3.3....0.0.0.0.3.0....0.0.0.0.3.0....0.0.0.0.3.3....0.0.0.0.3.3 ..0.0.0.0.0.0.2..0.0.0.0.0.3.0..0.0.0.0.1.0.0..0.0.0.0.0.3.2..0.0.0.0.3.3.3 CROSSREFS Cf. A270606. Sequence in context: A181746 A185429 A154876 * A331412 A204407 A144651 Adjacent sequences: A270609 A270610 A270611 * A270613 A270614 A270615 KEYWORD nonn AUTHOR R. H. Hardin, Mar 20 2016 STATUS approved

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Last modified June 1 11:52 EDT 2023. Contains 363068 sequences. (Running on oeis4.)