A270513 Number of 5X5X5 triangular 0..n arrays with some element plus some adjacent element totalling n+1 exactly once.

1149, 369072, 34889103, 1489277664, 32485734273, 448630205184, 4293998004723, 30804535353600, 177863468258565, 847631761246800, 3513899168535639, 12731640696610272, 41920406552431113, 125031636388348704

Offset

1,1

Comments

Row 5 of A270509.

Links

R. H. Hardin, Table of n, a(n) for n = 1..25

Example

Some solutions for n=1
......1..........0..........0..........1..........0..........0..........0
.....0.0........0.0........0.1........1.0........1.0........0.0........0.1
....0.0.0......1.0.0......1.0.0......0.0.0......0.0.0......1.0.0......0.0.0
...0.1.0.0....0.0.0.0....0.0.0.1....0.0.1.0....0.1.0.0....1.0.0.1....1.0.0.0
..0.1.0.1.0..1.0.0.1.1..0.0.0.1.0..1.0.0.0.0..0.0.1.0.1..0.0.0.0.0..0.0.0.1.1

Crossrefs

Cf. A270509.

Sequence in context: A274297 A074255 A234684 * A233944 A329520 A054999

Adjacent sequences: A270510 A270511 A270512 * A270514 A270515 A270516

Keyword

nonn

Author

R. H. Hardin, Mar 18 2016

Status

approved