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A263435
Number of (n+1)X(2+1) 0..4 arrays with each row and column divisible by 13, read as a base-5 number with top and left being the most significant digits.
1
2, 21, 180, 1225, 9820, 90785, 841164, 7551453, 69952442, 680669118, 6633057660, 63951722552, 623631395787, 6183296733749, 61331317468332, 606202380764411, 6014248065257267, 59984150594548551, 598328234748009180
OFFSET
1,1
COMMENTS
Column 2 of A263439.
FORMULA
Empirical recurrence of order 88 (see link above)
EXAMPLE
Some solutions for n=4
..1..2..4....2..0..2....4..3..2....0..0..0....1..0..1....0..0..0....3..3..1
..3..3..1....4..3..2....4..0..4....4..0..4....0..0..0....1..2..4....3..0..3
..0..2..3....2..0..2....4..3..2....4..0..4....4..0..4....1..0..1....2..3..0
..2..3..0....4..3..2....1..0..1....4..0..4....0..0..0....1..2..4....2..0..2
..4..0..4....0..0..0....2..0..2....4..0..4....3..0..3....1..0..1....4..0..4
CROSSREFS
Cf. A263439.
Sequence in context: A209519 A215710 A112673 * A202028 A265167 A037749
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 18 2015
STATUS
approved