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.

A188254 Number of arrangements of 8 nonzero numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.

Original entry on oeis.org

0, 4132, 51196, 368588, 1399640, 4875112, 11953848, 28779900, 58731504, 116157280, 200181920, 362242468, 569517636
Offset: 1

Views

Author

R. H. Hardin Mar 25 2011

Keywords

Comments

Row 6 of A188249

Examples

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

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