15690618378
domain: N
Appears in sequences
- Bending a piece of wire of length n+1 (configurations that can only be brought into coincidence by turning the figure over are counted as different).at n=22A001444
- a(n) = 3^n*(3^n + 1)/2.at n=11A025551
- Number of reversible strings with n beads of 3 colors.at n=22A032120
- a(n) = n! * Sum_{i+2j+3k=n} 1/(i!*(2j)!*(3k)!).at n=23A094717
- Number of inequivalent height 1 degree n polynomials with nonzero constant term.at n=22A323845