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A293999 Number of linear chord diagrams having n chords and no chord length larger than seven. 2
1, 1, 3, 15, 105, 945, 10395, 135135, 675675, 3790647, 23694083, 162961399, 1209395171, 9332799283, 70178707279, 474578729935, 3181796735723, 21683288205723, 150990425051331, 1069361164106091, 7617764489275535, 53863160510249543, 375786310609620379 (list; graph; refs; listen; history; text; internal format)
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

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Last modified August 1 00:13 EDT 2021. Contains 346377 sequences. (Running on oeis4.)