A131434 Number of prime knots on n crossings having Arf invariant 1.

0, 0, 1, 1, 1, 2, 4, 11, 24, 83, 269, 1070

Offset

1,6

Links

Table of n, a(n) for n=1..12.

KnotInfo, Table of Knots

Eric Weisstein's World of Mathematics, Arf Invariant

Example

For n <= 5, 3_1, 4_1, 5_1 are the prime knots with Arf Invariant 1. - Emma Joe Anderson, Jan 15 2023

Crossrefs

Cf. A131433.

Sequence in context: A196195 A205500 A342533 * A100550 A329707 A071973

Adjacent sequences: A131431 A131432 A131433 * A131435 A131436 A131437

Keyword

nonn,more

Author

Eric W. Weisstein, Jul 10 2007

Extensions

a(11)-a(12) added using data from the KnotInfo database (see Links above) by Emma Joe Anderson, Jan 15 2023

Status

approved