67645734912
domain: N
Appears in sequences
- Number of rooted graphs on n labeled nodes where the root has degree 2.at n=6A038094
- Hankel transform of sequence (b(n)) where b(n) = Sum_{i=0..n} binomial(2*i,i).at n=31A098106
- Row sums of A128134.at n=31A128135
- First differences of Mersenne numbers A001348, divided by 2.at n=10A139239
- Number of solutions to Sum_{i=1..n} x_i^2 == 0 (mod 8) with x_i in 0..7.at n=12A228921
- The number of eigenvectors with eigenvalue 1 summed over all linear operators on the vector space GF(2)^n.at n=6A322556