89478656

Appears in sequences

• Number of circulant tournaments on 2n+1 nodes up to Cayley isomorphism.at n=31A002086
• Number of nonisomorphic circulant tournaments, i.e., Cayley tournaments for cyclic group of order 2n-1.at n=32A049288
• Number of subsets of {1,2,3,...,n} that sum to 0 mod 3.at n=28A068010
• Number of subsets of {1,2,3,...,n} that sum to 0 mod 6.at n=29A068012
• Number of subsets of {1,2,3,...,n} that sum to 0 mod 12.at n=30A068033
• a(n) = (2*8^n + 2^n)/3.at n=9A082412
• a(n) = 10*a(n-2) - 16*a(n-4) for n>=4, with a(0)=a(1)=1, a(2)=6, a(3)=10.at n=18A083333
• Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k cylinder up to horizontal and vertical reflections by an asymmetric tile.at n=23A368257