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 A182283 Number of triangular n X n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any neighbor. 1
 1, 1, 15, 3429, 18172005, 3030361658604, 20538495213667066533, 7069329642959332230532689983, 150574890630606350105309341350824904669, 237075065354315062816111131522815337395866137560373, 32430625006159571889921247597353572731767630164652210957593666925 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS EXAMPLE Some solutions for n=4 .....0........0........0........0........0........0........0........0 ....1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2 ...2.0.3....3.4.0....2.0.1....0.3.4....3.4.0....3.4.0....3.4.5....3.4.0 ..3.1.4.1..4.2.5.4..3.1.3.0..4.5.2.5..0.5.3.6..4.5.3.6..5.0.2.1..1.2.3.5 CROSSREFS Cf. A182797, A193283. Sequence in context: A013720 A230672 A145189 * A194479 A262019 A153832 Adjacent sequences:  A182280 A182281 A182282 * A182284 A182285 A182286 KEYWORD nonn AUTHOR R. H. Hardin, Apr 23 2012 EXTENSIONS a(7)-a(11) from Andrew Howroyd, Apr 23 2018 STATUS approved

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Last modified November 29 10:41 EST 2021. Contains 349416 sequences. (Running on oeis4.)