387440172

Appears in sequences

• "BIK" (reversible, indistinct, unlabeled) transform of 2,2,2,2...at n=18A032124
• Number of periodic palindromic structures of length n using a maximum of three different symbols.at n=38A056504
• Number of strings over Z_3 of length n with trace 0 and subtrace 1.at n=19A073948
• Number of strings over Z_3 of length n with trace 1 and subtrace 2.at n=19A073952
• Number of elements of GF(3^n) with trace 0 and subtrace 2.at n=19A074002
• Number of elements of GF(3^n) with trace 1 and subtrace 0.at n=19A074003
• a(n) = 3^n + 9^n.at n=9A074610
• Expansion of 2*x^2*(1-2*x) / ((3*x-1)*(3*x^2-1)).at n=19A122007
• Inverse binomial transform of (A113405 preceded by 0).at n=20A133474
• Number of nX2 0..3 arrays with no element equal to the sum mod 4 of its horizontal and vertical neighbors.at n=8A183504
• 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=18A318610
• a(n) = n^n * Product_{p|n, p prime} (1 + 1/p^n).at n=8A320974
• 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=19A334656
• a(n) = n^9 * Product_{p|n, p prime} (1 + 1/p^9).at n=8A351304
• a(n) = n^9 * Sum_{d^2|n} 1 / d^9.at n=8A351607
• Sum of the 9th powers of the divisor complements of the odd proper divisors of n.at n=8A352055