28697814

Appears in sequences

• Losing initial configurations in 2-hole Tchuka Ruma.at n=35A007780
• Pisot sequences E(2,6), L(2,6), P(2,6), T(2,6).at n=15A008776
• a(0)=1; a(n) = 2*3^(n-1) for n >= 1.at n=16A025192
• a(n) = Sum_{k=0..m} (k+1) * A026148(n, m-k), where m=0 for n=1; m=n+1 for n >= 2.at n=15A027334
• a(2n) = 3^n, a(2n+1) = 2*3^n.at n=31A038754
• Number of n-step walks (each step +-1 starting from 0) which are never more than 2 or less than -2.at n=31A068911
• Coefficient of the highest power of q in the expansion of nu(0)=1, nu(1)=b and for n >= 2, nu(n) = b*nu(n-1) + lambda*(n-1)_q*nu(n-2) with (b,lambda)=(2,3), where (n)_q = (1+q+...+q^(n-1)) and q is a root of unity.at n=31A072985
• Expansion of (1+2*x+6*x^2)/(1-9*x^3).at n=23A076738
• Largest term in periodic part of continued fraction expansion of square root of 1+3^n or 0 if 1+3^n is square.at n=29A077626
• Sum of terms in periodic part of continued fraction expansion of square root of 1+3^n.at n=29A077630
• Binomial transform of a Jacobsthal trisection.at n=8A092810
• Number of permutations of {1,2,3,...,n} where, for 1 < i <= n, the i-th number has maximized sum of the i-1 absolute differences from all previous numbers of the permutation.at n=31A095698
• Expansion of (1+3*x)/(1-3*x).at n=15A099856
• a(1) = 3, a(n+1) = 2*(3^n).at n=15A110593
• Number of nonzero palindromes of length n (in base 3).at n=30A117855
• Number of nonzero palindromes of length n (in base 3).at n=31A117855
• Denominator of Euler(n, 1/27).at n=5A157094
• a(n) = 3*a(n-2) for n > 2; a(1) = 1, a(2) = 6.at n=29A166450
• Inverse binomial transform of A169609, or of A144437 preceded by 1.at n=32A168615
• a(0) = 1; thereafter a(2*n + 1) = 3^n, a(2*n + 2) = 2 * 3^n.at n=32A182522