299646
domain: N
Appears in sequences
- Number of involutions avoiding the pattern 21 (with a dot over the 1).at n=13A201689
- The Wiener index of the dendrimer D_3[n], defined pictorially in the A. R. Ashrafi et al. reference.at n=2A224433
- Sum of the divisors of 11^n-1.at n=4A366684
- Number of nonnesting permutations of the multiset {1,1,2,2,...,n,n} that avoid 123.at n=8A382361