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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
OFFSET
0,3
LINKS
CROSSREFS
Column k=7 of A293960.
Sequence in context: A328866 A247304 A293998 * A294000 A294001 A294002
KEYWORD
nonn,easy
AUTHOR
Alois P. Heinz, Oct 21 2017
STATUS
approved