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A270855 Number of 6X6X6 triangular 0..n arrays with some element plus some adjacent element totalling n+1, n or n-1 exactly once. 1
0, 0, 28440, 27582438, 5805948474, 571228600932, 29999932959600, 1131964246928502, 27738553460278170, 526704152938743948, 7209576736148583840, 80085435443327098104, 700902167873486650002 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 6 of A270850.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..15

EXAMPLE

Some solutions for n=3

.......0............2............3............3............3............1

......0.1..........3.3..........3.3..........3.3..........3.2..........0.0

.....0.0.1........2.3.3........3.3.2........3.3.3........2.3.3........0.0.1

....0.0.0.0......3.3.3.2......3.2.3.3......3.3.3.2......3.3.3.3......0.0.0.0

...0.0.0.0.1....3.2.3.3.3....3.3.3.3.2....3.3.3.3.3....3.3.3.2.2....0.0.0.1.0

..0.0.0.1.0.0..2.3.3.3.2.2..2.3.2.3.2.3..3.3.3.3.2.2..2.3.2.3.3.3..1.0.0.1.0.0

CROSSREFS

Cf. A270850.

Sequence in context: A049052 A266039 A202614 * A250992 A250630 A236595

Adjacent sequences:  A270852 A270853 A270854 * A270856 A270857 A270858

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 24 2016

STATUS

approved

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Last modified November 19 03:48 EST 2019. Contains 329310 sequences. (Running on oeis4.)