25669818476
domain: N
Appears in sequences
- Motzkin numbers: number of ways of drawing any number of nonintersecting chords joining n (labeled) points on a circle.at n=26A001006
- A bisection of the Motzkin numbers A001006.at n=13A026945
- Expansion of (1 + x - sqrt(1 - 2*x - 3*x^2)) / 2 in powers of x.at n=28A086246
- Even Motzkin numbers.at n=8A134718
- A signed variant of the Motzkin numbers.at n=27A166587
- Expansion of (3 -x -sqrt(1-2*x-3*x^2))/2.at n=28A168049
- A permutation of Motzkin numbers by reversal of indices in blocks of length 7.at n=23A180352