A089794 Number of amphichiral alternating knots with n=2k crossings (k=2,3,4,...).

1, 1, 5, 13, 54

Offset

4,3

References

Liang C., Mislow K.: On amphicheiral knots. Journal of Mathematical Chemistry 15 (1994), 1-34.

Links

Table of n, a(n) for n=4..8.

Jablan S., Ordering Knots.

Jablan S. and Sazdanovic R., LinKnot.

Example

E.g. 22 for n=4; 2112 for n=6; 2222, 3113, 44, 8*, .2.2 for n=8, etc.

Crossrefs

Sequence in context: A149540 A149541 A149542 * A216821 A039510 A149543

Adjacent sequences: A089791 A089792 A089793 * A089795 A089796 A089797

Keyword

nonn

Author

Slavik Jablan and Radmila Sazdanovic, Jan 09 2004

Status

approved