A265925 Number of nX5 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.

1252, 44916, 273616, 1546496, 8821464, 51986544, 309447168, 1904101280, 11662822720, 73936333840, 461379072240, 2989492800168, 18885457119368, 124303652993736, 791413858826744, 5265714915850752, 33682209801072272

Offset

1,1

Comments

Column 5 of A265928.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 14*a(n-1) +114*a(n-2) -2416*a(n-3) -1855*a(n-4) +173910*a(n-5) -325748*a(n-6) -6792128*a(n-7) +23703581*a(n-8) +156116706*a(n-9) -782263598*a(n-10) -2103771328*a(n-11) +15368975735*a(n-12) +14058283410*a(n-13) -195305474720*a(n-14) +17084928400*a(n-15) +1657274833004*a(n-16) -1220297285976*a(n-17) -9420990684080*a(n-18) +11379059105120*a(n-19) +35043535878848*a(n-20) -55963552156032*a(n-21) -80348150064128*a(n-22) +159059277862912*a(n-23) +100278463577088*a(n-24) -247797165996032*a(n-25) -52668192727040*a(n-26) +177859657482240*a(n-27) +10696615526400*a(n-28) -42129240883200*a(n-29) -726663168000*a(n-30) +3114270720000*a(n-31) for n>39

Example

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

Crossrefs

Cf. A265928.

Sequence in context: A344035 A265970 A264291 * A252149 A252157 A252150

Adjacent sequences: A265922 A265923 A265924 * A265926 A265927 A265928

Keyword

nonn

Author

R. H. Hardin, Dec 18 2015

Status

approved