481952

Appears in sequences

• Binomial transform of the tribonacci sequence A000073 (shifted left twice).at n=13A117189
• a(0)=1=a(1), a(2)=2, a(3)=5; thereafter a(n+3)=4*a(n+2)-4*a(n+1)+2*a(n) for n>=1.at n=14A159035
• Dihedral unlabeled Motzkin numbers: number of ways of drawing any number of nonintersecting chords joining n unlabeled points equally spaced on a circle, up to rotations and reflections of the circle.at n=19A185100