A202121 Number of -5..5 arrays of n elements with first, second and third differences also in -5..5.

11, 91, 587, 2833, 14063, 69573, 345241, 1713419, 8503671, 42203951, 209464959, 1039605903, 5159703889, 25608300207, 127097485317, 630802143547, 3130756848055, 15538372099147, 77119055108453, 382752363927519

Offset: 1

Author

R. H. Hardin Dec 11 2011

Keywords

• nonn

Comments

Column 5 of A202124

Examples

			Some solutions for n=5
.-3...-3...-2...-3....0....4....0....0...-4....0...-5....1...-5....3....2...-4
..0....1....0...-1....2....0....2...-2...-1....1...-5...-3...-4....3....0...-5
..0....5...-2....2....2....0....3...-3....2....1...-2...-4....0....1...-3...-4
..2....4...-3....3....0....0....5...-3....4...-2....0....0....2....0...-4...-3
..5...-1...-5....3....0...-5....3....0....3...-5....4....4....1....2...-1....1
		

Links

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