VOOZH about

URL: https://oeis.org/A265923

⇱ A265923 - OEIS

login
A265923
Number of n X 3 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.
1
92, 1740, 17936, 174000, 1671744, 15962560, 152267520, 1451371264, 13834836992, 131883277312, 1257236156416, 11986527891456, 114277874876416, 1089597587963904, 10388632576131072, 99054000222699520, 944443268554031104, 9005175397018238976, 85862124616319762432
OFFSET
1,1
LINKS
FORMULA
Empirical: a(n) = 8*a(n-1) +96*a(n-2) -736*a(n-3) -2464*a(n-4) +20480*a(n-5) +13312*a(n-6) -196096*a(n-7) +78592*a(n-8) +600064*a(n-9) -589824*a(n-10) for n>13.
EXAMPLE
Some solutions for n=4:
..1..4..0....2..3..1....2..1..3....1..4..4....0..0..3....0..4..1....2..4..0
..2..3..1....0..0..4....1..0..4....0..1..3....1..1..2....2..1..4....4..0..3
..3..1..4....3..4..0....2..1..3....1..0..0....4..0..0....3..4..0....2..1..1
..2..0..1....1..0..4....1..4..0....2..3..1....3..2..2....2..2..1....4..3..3
CROSSREFS
Column 3 of A265928.
Sequence in context: A232795 A269439 A269623 * A249236 A166824 A382836
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 18 2015
STATUS
approved