141214502520
domain: N
Appears in sequences
- a(n) = 3^n*(3^n-1)/2.at n=12A026121
- Number of reversible strings with n beads of 3 colors. If more than 1 bead, not palindromic.at n=23A032086
- Expansion of x^2/((3*x-1)*(3*x^2-1)).at n=25A167993
- Least triangular number that is the product of n triangular numbers greater than 1.at n=11A212616
- Least triangular number that is the product of n triangular numbers greater than 1.at n=12A212616