839808

Appears in sequences

• Denominator of sum of -8th powers of divisors of n.at n=5A017680
• Ratios of successive terms are 3, 2, 3, 2, 3, 2, 3, 2, ...at n=15A026532
• a(n) = 6*a(n-2), starting with 1, 3, 9.at n=15A026565
• Sixth column of triangle A067417.at n=5A067421
• Numbers n such that A017666(n)=phi(n).at n=20A069058
• 6-full numbers: if p divides n then so does p^6.at n=36A069493
• a(n) = 2^A066657(n) * 3^A066658(n).at n=15A076941
• Expansion of exp(3*x)*cosh(3*x).at n=8A081341
• For n>3, a(n) = smallest number divisible by exactly n-2 previous terms; a(n)=n for n<=3.at n=29A084391
• Triangle read by rows: T(n,k) = 2^k * 3^n, 0 <= k <= n.at n=43A100852
• a(n)=Product{k=0..n, 1+2^A010060(k)}/2.at n=15A101652
• Numbers k such that p=6k+1 is prime and cos(2*Pi/p) is an algebraic number of a 3-smooth degree, but not 2-smooth.at n=41A125867
• a(n) = 6^n*Lucas(n), where Lucas = A000204.at n=5A127213
• a(n) = 3*6^n.at n=7A169604
• a(n) = ceiling((n+1)^4/2).at n=35A171714
• G.F.: exp( Sum_{n>=1} A014578(n)*(3x)^n/n ), where A014578 is the binary expansion of Thue constant.at n=13A174470
• Number of compositions of even natural numbers into 8 parts <= n.at n=5A191495
• Number of compositions of odd natural numbers into 8 parts <=n.at n=5A191899
• Reciprocal of Vandermonde determinant of (1/3,1/6,...,1/(3n)).at n=3A203428
• Number of 2 X 2 matrices with all terms in {0,1,...,n} and even trace.at n=35A210378