A293999 Number of linear chord diagrams having n chords and no chord length larger than seven.

1, 1, 3, 15, 105, 945, 10395, 135135, 675675, 3790647, 23694083, 162961399, 1209395171, 9332799283, 70178707279, 474578729935, 3181796735723, 21683288205723, 150990425051331, 1069361164106091, 7617764489275535, 53863160510249543, 375786310609620379

Offset

0,3

Links

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

Crossrefs

Column k=7 of A293960.

Sequence in context: A328866 A247304 A293998 * A294000 A294001 A294002

Adjacent sequences: A293996 A293997 A293998 * A294000 A294001 A294002

Keyword

nonn,easy

Author

Alois P. Heinz, Oct 21 2017

Status

approved