A290688 Number of linear chord diagrams having 2n chords and minimal chord length n.

1, 2, 26, 854, 52938, 5317342, 788783482, 162272284974, 44237669097482, 15439822086531614, 6715538352190953498, 3561963935537880874894, 2263250481436117389497386, 1697243825672918269588268286, 1483337827671250048404238399034, 1494549066141865576239455292770414

Offset: 0

Author

Alois P. Heinz, Oct 18 2017

Keywords

• nonn

Crossrefs

Cf. A293881.

Formula

a(n) = A293881(2n,n).