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

Author

R. H. Hardin, Dec 18 2015

Keywords

• nonn

Comments

Column 5 of A265928.

Examples

			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
		

Links

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

Crossrefs

Cf. A265928.

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) [phone]*a(n-8) [phone]*a(n-9) -782263598*a(n-10) -2103771328*a(n-11) [phone]*a(n-12) [phone]*a(n-13) -195305474720*a(n-14) [phone]*a(n-15) [phone]*a(n-16) -1220297285976*a(n-17) -9420990684080*a(n-18) [phone]*a(n-19) [phone]*a(n-20) -55963552156032*a(n-21) -80348150064128*a(n-22) [phone]*a(n-23) [phone]*a(n-24) -247797165996032*a(n-25) -52668192727040*a(n-26) [phone]*a(n-27) [phone]*a(n-28) -42129240883200*a(n-29) -726663168000*a(n-30) [phone]*a(n-31) for n>39