I’m not sure if this is right but I got: 51
Don’t mind this.. ⬇️
Fifty-one is a pentagonal number as well as a centered pentagonal number and an 18-gonal number and a Perrin number. It is also the 6th Motzkin number, telling the number of ways to draw non-intersecting chords between any six points on a circle's boundary, no matter where the points may be located on the boundary.
