67081765932
domain: N
Appears in sequences
- a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 2, 0, 1, 2.at n=27A025247
- a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-1)*a(1) for n >= 4.at n=27A025265
- Expansion of (1-2x-sqrt(1-4x+4x^2-4x^3))/(2x^2).at n=25A091561
- Number of Dyck paths of semilength n with no peaks at height 0 (mod 3) and no valleys at height 2 (mod 3).at n=26A152225