27711domain: NAppears in sequencesNumber of 4-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and avoiding the patterns z z+1 z+2 and z z-1 z-2.at n=26A209116Number of compositions of n with no part divisible by 3 and an even number of parts congruent to 4 or 5 modulo 6.at n=19A325473