88064
domain: N
Appears in sequences
- Total number of leaves (nodes of vertex degree 1) in all graphs of n nodes.at n=8A055540
- a(n) = (2*n+1)*2^floor((n+1)/2).at n=21A097578
- A characteristic triangle for the Euler totient function (A000010).at n=45A110032
- a(1)=1, a(2)=1, a(3)=4, a(4)=0; a(n)=12a(n-2)-16a(n-3) for n>=5.at n=10A123016
- Row sums of triangle A133085.at n=13A133086
- Numbers k such that (number of prime factors of k counted with multiplicity) less (number of distinct prime factors of k) = 10.at n=31A195069
- Numbers k such that k divides A243071(k).at n=40A364497
- Number of subsets of {1..n} that cannot be linearly combined using nonnegative coefficients to obtain n.at n=27A365380
- a(n) = Sum_{k>=0} (1/2)^(k+1) * Stirling2(n+k,k).at n=5A390890