1743421725
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=20A001444
- a(n) = 3^n*(3^n + 1)/2.at n=10A025551
- Number of reversible strings with n beads of 3 colors.at n=20A032120
- a(n) = (n^10 + n^5)/2.at n=9A071236
- a(n) = n^10*(n^10 + 1)/2.at n=3A170802
- Number of inequivalent height 1 degree n polynomials with nonzero constant term.at n=20A323845
- Cogrowth sequence of the 18-element group S3 X C3 = <S,T,U | S^3, T^2, U^3, (ST)^2, [S,U], [T,U]>.at n=22A378109