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.

A188326 Number of nondecreasing arrangements of n nonzero numbers in -n..n with sum zero.

Original entry on oeis.org

0, 2, 4, 20, 86, 424, 2128, 11200, 60372, 333254, 1872728, 10688284, 61792756, 361247006, 2132290212, 12692489494, 76115308712, 459476777038, 2790092370660, 17032567789840, 104478722395496, 643682329681246, 3981493201581658
Offset: 1

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Author

R. H. Hardin Mar 28 2011

Keywords

Comments

Column 2 of A188333

Examples

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

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