17895736

Appears in sequences

• a(n) is the number of distinct (infinite) output sequences from binary n-stage shift register which feeds back the complement of the last stage.at n=30A000016
• Number of circulant tournaments on 2n+1 nodes up to Cayley isomorphism.at n=29A002086
• Number of nonisomorphic circulant tournaments, i.e., Cayley tournaments for cyclic group of order 2n-1.at n=30A049288
• Number of subsets of {1,2,3,...,n} that sum to 0 mod 15.at n=28A068036
• Number of binary vectors (x_1,...x_(n-1)) satisfying Sum_{i=1..n-1} (-1)^i*i*x_i = 0 (mod n).at n=28A114702
• Number of frieze patterns of length n under a certain group (see Pisanski et al. for precise definition).at n=15A123046
• a(n) = A000016(2*n).at n=15A300668
• Table read by antidiagonals: T(n,k) is the number of tilings of the n X k torus up to horizontal and vertical reflections by an asymmetric tile.at n=23A368304
• Table read by antidiagonals: T(n,k) is the number of tilings of the n X k torus up to horizontal and vertical reflections by an asymmetric tile.at n=25A368304