cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A202251 Number of zero-sum -7..7 arrays of n elements with adjacent element differences also in -7..7.

Original entry on oeis.org

1, 7, 75, 779, 8211, 88301, 960501, 10536609, 116366779, 1292162535, 14412747241, 161362353297, 1812334370533, 20410840535049, 230416525827147, 2606567584536987, 29540755940559963, 335338507713978229
Offset: 1

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Author

R. H. Hardin Dec 14 2011

Keywords

Comments

Column 7 of A202252

Examples

			Some solutions for n=6
.-3....3....6...-2...-7...-5....6...-5...-5....1...-4....3....5...-2....4...-3
..3....3....0...-1...-7...-2...-1....2...-1....4....3....4...-2...-5....0...-2
..3...-3....1....3....0....5....3....3....2...-2....2...-2....2...-3...-6....1
.-4....4...-3....0....7...-1...-1...-1....2....4...-1...-6....0...-1....1...-2
..3...-2...-3...-2....2....0...-3....1....0...-1....0...-1....1....6....4....1
.-2...-5...-1....2....5....3...-4....0....2...-6....0....2...-6....5...-3....5

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