19902
domain: N
Appears in sequences
- Number of independent polynomial invariants of symmetric matrix of order n.at n=9A007719
- Coordination sequence for Cr3Si, Cr position.at n=36A009928
- Nonisomorphic catacondensed monoheptafusenes (see reference for precise definition).at n=9A045904
- Four-column table read by rows: number of nonisomorphic systems of catafusenes in an example (see Cyvin et al. (1994) for precise definition).at n=34A121178
- Expansion of (1 - x + x^2 + sqrt(1 + 2*x + 3*x^2 - 2*x^3 + x^4)) / 2 in powers of x.at n=21A239466