61726
domain: N
Appears in sequences
- a(n) = T(n,n), T given by A026536. Also a(n) = number of integer strings s(0), ..., s(n), counted by T, such that s(n)=0.at n=15A026537
- Number of chiral chord diagrams on n nodes.at n=7A054938
- Integers that do not appear in A103502.at n=35A103504
- Number of different values assumed by a/b+c/d as a,b,c,d range between 1 and n.at n=27A119868