A294000 Number of linear chord diagrams having n chords and no chord length larger than eight.

1, 1, 3, 15, 105, 945, 10395, 135135, 2027025, 11486475, 72025173, 497809599, 3759823201, 30676852011, 265149012989, 2341915514787, 19966886272757, 154807536575931, 1184739742163293, 9169888620679203, 72323378114077925, 580752883543676927, 4717664674505952353

Offset

0,3

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Crossrefs

Column k=8 of A293960.

Sequence in context: A247304 A293998 A293999 * A294001 A294002 A001147

Adjacent sequences: A293997 A293998 A293999 * A294001 A294002 A294003

Keyword

nonn,easy

Author

Alois P. Heinz, Oct 21 2017

Status

approved