31380882462
domain: N
Appears in sequences
- J_n(9) (see A059379).at n=11A059410
- Number of strings over Z_3 of length n with trace 0 and subtrace 1.at n=23A073948
- Number of strings over Z_3 of length n with trace 0 and subtrace 2.at n=23A073949
- Sum 3^max(k,n-k),k=0..n.at n=21A107660
- Expansion of (2*x-1)*(x-1)*x / ((3*x-1)*(3*x^2-1)).at n=23A122008
- Binomial transform of A131666.at n=24A135254
- Number of non-palindromic n-tuples of 3 distinct elements.at n=21A242278
- a(1) = 2, a(2) = 4, a(3) = 6; for n > 3, a(n) = 3*a(n-1) - 3*a(n-2) + 9*a(n-3).at n=22A318609
- a(n) is the number of words of length n on the alphabet {0,1,2} with the number of 0's plus the number of 1's congruent to the number of 2's modulo 3.at n=23A334656
- Number of words of length 3*n that can be formed with a three-letter alphabet when the number of letters of each type is == 1 (mod 3).at n=8A391469
- Number of words of length 3*n that can be formed with a three-letter alphabet when the number of letters of each type is == 2 (mod 3).at n=8A391470