3623878656

Appears in sequences

• Theta series of D*_27 lattice.at n=35A022080
• a(n) = n*2^n.at n=27A036289
• a(1)=1, then a(n)=3*a(n-1) if n is already in the sequence, a(n)=2*a(n-1) otherwise.at n=30A079352
• Expansion of (1 - 4*x + 6*x^2)/(1 - 2*x)^2.at n=28A097064
• Smallest number beginning with 3 and having exactly n prime divisors counted with multiplicity.at n=29A106423
• Number of functions f:[n]->[n] such that f[(2*x) mod n]=[2*f(x)] mod n for all x in [n], for n=1,2,3,... Here [n] denotes {0,1,2,...,n-1}.at n=35A117987
• a(n) = 2^(n-1)*A047240(n).at n=27A128205
• Denominator of (ordinary) expansion of log((x/2-1)/(x-1)).at n=27A131135
• a(n) is the number of shapes of balanced trees with constant branching factor 4 and n nodes. The node is balanced if the size, measured in nodes, of each pair of its children differ by at most one node.at n=31A131890
• Row sums of triangle A134400.at n=27A134401
• Records in (A063375: Number of divisors of Fibonacci(n)).at n=24A154906
• a(n) = 27*2^n.at n=27A175806
• Number of n X 2 0..2 arrays with new values 0..2 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors).at n=15A208428
• a(n) = 27*8^n.at n=9A272342
• a(n) = (2n + 1)*2^(2n + 1); numbers k such that v(k)*2^v(k) = k, where v(n) = A007814(n) is 2-adic valuation of n.at n=13A288443
• Expansion of 1/Sum_{k>=0} A000326(k+1)*x^k.at n=30A296775
• a(n) = Product_{k=1..n} d(2*k - 1), where d() is the number of divisors function A000005.at n=23A334764