2324522934

Appears in sequences

• Pisot sequences E(2,6), L(2,6), P(2,6), T(2,6).at n=19A008776
• a(0)=1; a(n) = 2*3^(n-1) for n >= 1.at n=20A025192
• 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=19A027334
• a(n) = (n-1)*3^(n-2), n > 0.at n=18A027471
• Scaled Chebyshev U-polynomials evaluated at sqrt(3)/2; expansion of 1/(1 - 3*x + 3*x^2).at n=38A057083
• Arithmetic derivative of n^n.at n=9A068327
• Expansion of (1+2*x+6*x^2)/(1-9*x^3).at n=29A076738
• Product of three solutions of the Diophantine equation x^2 - y^2 = z^3.at n=8A085482
• Binomial transform of a Jacobsthal trisection.at n=10A092810
• Expansion of (1+3*x)/(1-3*x).at n=19A099856
• a(1) = 3, a(n+1) = 2*(3^n).at n=19A110593
• Denominators of ternary BBP-type series for log(5).at n=13A164985
• a(n) = n^n*(3+n)/2.at n=8A174962
• Number of (n+1) X 2 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly three counterclockwise and three clockwise edge increases.at n=17A206143
• a(n) = 2*n*3^(2*n-1).at n=9A230540
• Sum of the degrees of asymmetry of all ternary words of length n.at n=18A274499
• Numbers m > 2 such that every divisor > 2 is the sum of two or more consecutive divisors.at n=29A290582
• Expansion of Product_{k>=1} (1 - 3^(k-1)*x^k).at n=24A352786