A263550 Number of (n+1)X(n+1) 0..4 arrays with each row and column divisible by 7, read as a base-5 number with top and left being the most significant digits.

4, 123, 198581, 7482387694, 7393696581915805, 183405125237662914611769, 114199199060786708530926848241438

Offset

1,1

Comments

Diagonal of A263558.

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=3
..1..0..3..0....1..4..2..3....0..3..4..3....0..4..3..4....0..1..4..4
..0..3..3..1....0..3..3..1....3..0..0..3....4..1..2..4....3..2..1..4
..0..0..2..4....0..1..3..2....1..0..0..1....3..0..4..4....3..2..4..3
..1..2..2..4....1..1..3..3....4..3..4..0....4..0..3..3....1..4..1..1

Crossrefs

Cf. A263558.

Sequence in context: A144993 A064681 A219871 * A232592 A005936 A241648

Adjacent sequences: A263547 A263548 A263549 * A263551 A263552 A263553

Keyword

nonn

Author

R. H. Hardin, Oct 21 2015

Status

approved