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.

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A208823 Number of n-bead necklaces labeled with numbers -6..6 allowing reversal, with sum zero.

Original entry on oeis.org

1, 7, 25, 210, 1755, 17339, 177097, 1888153, 20587627, 228891069, 2582512649, 29499246456
Offset: 1

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Author

R. H. Hardin, Mar 01 2012

Keywords

Comments

Column 6 of A208825.

Examples

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

A208824 Number of n-bead necklaces labeled with numbers -7..7 allowing reversal, with sum zero.

Original entry on oeis.org

1, 8, 32, 316, 3085, 35288, 417204, 5134796, 64630243, 829140440, 10794728782, 142275197892, 1894548608563
Offset: 1

Views

Author

R. H. Hardin, Mar 01 2012

Keywords

Comments

Column 7 of A208825.

Examples

			Some solutions for n=3:
.-3...-3....0...-5...-2...-5...-7...-6...-4...-6...-4...-6...-3...-7...-2...-7
..0...-3....0....2....0....0....0....1...-3...-1...-2....3...-1....3...-2....2
..3....6....0....3....2....5....7....5....7....7....6....3....4....4....4....5
Previous Showing 11-12 of 12 results.

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