1195400domain: NAppears in sequencesa(n)=a(n-1)+floor((a(n-2)+a(n-3))/2), with a(n)=n for n<3.at n=34A214040Number of permutations p of [n] with no fixed points and cyclic displacement of elements restricted by two: p(i)<>i and (i-p(i) mod n <= 2 or p(i)-i mod n <= 2).at n=22A260074