4785156
domain: N
Appears in sequences
- "BIK" (reversible, indistinct, unlabeled) transform of 2,2,2,2...at n=14A032124
- Number of periodic palindromic structures of length n using a maximum of three different symbols.at n=30A056504
- Number of strings over Z_3 of length n with trace 0 and subtrace 2.at n=15A073949
- Number of strings over Z_3 of length n with trace 1 and subtrace 2.at n=15A073952
- Number of elements of GF(3^n) with trace 0 and subtrace 1.at n=15A074001
- Number of elements of GF(3^n) with trace 1 and subtrace 1.at n=15A074004
- a(n) = 3^n + 9^n.at n=7A074610
- Let f(n) = fraction of digits that are nonzero when n is written in base 2 and g(n) the same fraction for base 3. Let h(n) = max {f(n), g(n)}. Sequence gives n for which h(n) sets a new low record.at n=11A078415
- Expansion of 2*x^2*(1-2*x) / ((3*x-1)*(3*x^2-1)).at n=15A122007
- Binomial transform of A131666.at n=16A135254
- a(1) = 0, a(2) = 4, a(3) = 12; for n > 3, a(n) = 3*a(n-1) - 3*a(n-2) + 9*a(n-3).at n=14A318610
- a(n) = n^7 * Product_{p|n, p prime} (1 + 1/p^7).at n=8A351302
- a(n) = n^7 * Sum_{d^2|n} 1 / d^7.at n=8A351605
- Sum of the 7th powers of the divisor complements of the odd proper divisors of n.at n=8A352053
- a(n) = Sum_{d|n} (d+2)^n.at n=6A367507