387400806
domain: N
Appears in sequences
- J_n(9) (see A059379).at n=9A059410
- J_n(n), where J is the Jordan function, J_n(n) = n^n product{p|n}(1 - 1/p^n), the product is over the distinct primes, p, dividing n.at n=8A067858
- Jordan function J_9(n).at n=8A069094
- Number of strings over Z_3 of length n with trace 0 and subtrace 2.at n=19A073949
- Number of strings over Z_3 of length n with trace 1 and subtrace 0.at n=19A073950
- Number of elements of GF(3^n) with trace 0 and subtrace 1.at n=19A074001
- Number of elements of GF(3^n) with trace 1 and subtrace 2.at n=19A074005
- a(n) = (3^n + 2*3^(n/2)*cos(n*Pi/6))/3.at n=19A092236
- Sum 3^max(k,n-k),k=0..n.at n=17A107660
- Expansion of (2*x-1)*(x-1)*x / ((3*x-1)*(3*x^2-1)).at n=19A122008
- a(n) = n^6 - n^3.at n=27A136006
- Number of non-palindromic n-tuples of 3 distinct elements.at n=17A242278
- 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=18A318609