9565938

Appears in sequences

• a(n) = 2*n^(n-2).at n=8A003308
• Losing initial configurations in 2-hole Tchuka Ruma.at n=33A007780
• Pisot sequences E(2,6), L(2,6), P(2,6), T(2,6).at n=14A008776
• Numbers n such that n divides n-th Lucas number A000032(n).at n=28A016089
• a(0)=1; a(n) = 2*3^(n-1) for n >= 1.at n=15A025192
• 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=14A027334
• Denominator of Bernoulli(2n,1/3).at n=7A033471
• Dirichlet convolution of powers of 3 (3,9,27,...) with themselves.at n=12A034719
• a(2n) = 3^n, a(2n+1) = 2*3^n.at n=29A038754
• Expansion of (11*x-2)/(1-3*x)^2.at n=12A053566
• Sums of two powers of 9.at n=35A055260
• Number of n-step walks (each step +-1 starting from 0) which are never more than 2 or less than -2.at n=29A068911
• Largest n-digit number with only prime divisors 2 or 3 (i.e., of the form 2^a * 3^b).at n=6A069055
• Numbers n such that A017666(n)=phi(n).at n=28A069058
• 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=29A072985
• Expansion of (1+2*x+6*x^2)/(1-9*x^3).at n=22A076738
• 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=27A077626
• Sum of terms in periodic part of continued fraction expansion of square root of 1+3^n.at n=27A077630
• a(n) = (5*3^n + (-3)^n)/6.at n=15A083423
• a(n) = A003474(n)/n.at n=17A094678