A062386 Number of alternating link diagrams with n crossings, 1 connected component and two external legs.

1, 12, 114, 1030, 9290, 84840, 787082, 7415814, 70867212, 685839770, 6712285600, 66349573368, 661680191832, 6651030871168, 67329662060890, 685953949494774, 7028941367108708, 72403769391718890

Offset

2,2

Links

Table of n, a(n) for n=2..19.

J. L. Jacobsen and P. Zinn-Justin, A Transfer Matrix approach to the Enumeration of Colored Links, J. Knot Theory, 10 (2001), 1233-1267.

Crossrefs

A column of A062038.

Sequence in context: A331515 A154237 A006635 * A080602 A333299 A090250

Adjacent sequences: A062383 A062384 A062385 * A062387 A062388 A062389

Keyword

nonn

Author

N. J. A. Sloane, Feb 09 2002

Status

approved