A294001 Number of linear chord diagrams having n chords and no chord length larger than nine.

1, 1, 3, 15, 105, 945, 10395, 135135, 2027025, 34459425, 218243025, 1512548793, 11451456921, 94099903993, 832822929881, 7850100744697, 77247769844585, 766602148661941, 7301487795390325, 63860693057569633, 549669975975395633, 4765146317902742829

Offset

0,3

Links

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

Crossrefs

Column k=9 of A293960.

Sequence in context: A293998 A293999 A294000 * A294002 A001147 A330797

Adjacent sequences: A293998 A293999 A294000 * A294002 A294003 A294004

Keyword

nonn,easy

Author

Alois P. Heinz, Oct 21 2017

Status

approved