A202666 Number of -n..n arrays of 6 elements with first through fourth differences also in -n..n.

23, 363, 2591, 11413, 37505, 101567, 238453, 503849, 979919, 1783797, 3075089, 5067465, 8035301, 12330321, 18389067, 26749755, 38062317, 53112803, 72823295, 98289495, 130780551, 171770127, 222946517, 286251779, 363870209, 458294877

Offset: 1

Author

R. H. Hardin Dec 22 2011

Keywords

• nonn

Comments

Row 6 of A202664

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..121