7456600
domain: N
Appears in sequences
- Number of circulant tournaments on 2n+1 nodes up to Cayley isomorphism.at n=27A002086
- Number of nonisomorphic circulant tournaments, i.e., Cayley tournaments for cyclic group of order 2n-1.at n=28A049288
- Number of subsets of {1,2,3,...,n} that sum to 0 mod 9.at n=26A068030
- Number of subsets of {1,2,3,...,n} that sum to 0 mod 18.at n=27A068039