786432
domain: N
Appears in sequences
- a(n) = 3*4^(n-1), n>0; a(0)=1.at n=10A002001
- Number of rooted planar cubic maps with 2n vertices.at n=6A002005
- Numbers that are the sum of 3 positive 9th powers.at n=19A003392
- Smallest number with 2n divisors.at n=18A003680
- Expansion of g.f. (1+x)/(1-2*x).at n=19A003945
- Numbers that are the sum of at most 3 positive 9th powers.at n=34A004887
- Smallest number with exactly n divisors.at n=37A005179
- a(n) = 3*2^n.at n=18A007283
- a(n) = Sum_{k=0..m} (k+1) * A026009(n, m-k) where m = floor(n/2)+1.at n=19A027292
- Dan numbers: numbers m of the form 2^j * 3^k such that m +- 1 are twin primes.at n=12A027856
- Numbers of the form 2^n or 3*2^n.at n=38A029744
- First differences of A045891.at n=19A034007
- a(n+1)=2a(n)-4a(n-1)+4a(n-2).at n=24A035302
- Let n = p_1*p_2*...*p_k be the prime factorization of n, with the primes sorted in descending order. Then a(n) = 2^(p_1 - 1)*3^(p_2 - 1)*...*A000040(k)^(p_k - 1).at n=37A037019
- Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*8^j.at n=26A038238
- Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*4^j.at n=22A038282
- Least number with exactly n divisors that are at most its square root.at n=18A038549
- Row sums of the Lucas triangle A029635.at n=19A042950
- a(n) is the smallest number such that a(n)+1 is a prime and the largest power of 2 which divides it is 2^n.at n=18A057777
- Smallest number x such that cototient(x) = 2^n.at n=19A058764