83886080
domain: N
Appears in sequences
- Expansion of (1+x)/(1-4*x).at n=13A003947
- a(n) = 5 * 2^n.at n=24A020714
- Fourth column of triangle A067410.at n=9A067412
- Smallest multiple of n^n that begins with n.at n=7A078230
- Expansion of g.f.: (1+x^2)/(1-2*x).at n=26A084215
- a(0)=1, a(1)=5, a(n+2)=4a(n), n>0.at n=25A084568
- a(n) = Sum_{k=0..n} binomial(n+(-1)^k, k).at n=25A087940
- Number of subsets of {1, ..., n} containing exactly one twin prime pair.at n=32A089882
- Number of subsets of {1,.., n} containing exactly one square.at n=28A089889
- Number of subsets of {1,.., n} containing exactly two squares.at n=27A089890
- Expansion of (1+x)^2/(1-4*x^2).at n=26A104721
- Smallest number beginning with 8 and having exactly n prime divisors counted with multiplicity.at n=24A106428
- A Hankel transform of a Catalan product.at n=5A134183
- Binomial transform of A010685.at n=25A146523
- a(0) = 9, a(n) = 2*a(n-1) + 2^(n-1) for n > 0.at n=22A159697
- Number of binary strings of length n with equal numbers of 001 and 100 substrings.at n=27A164143
- a(n) = 8*a(n-2) for n > 2; a(1) = 5, a(2) = 12.at n=16A164737
- Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^14 = I.at n=13A167106
- Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^15 = I.at n=13A167650
- Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^16 = I.at n=13A167896