98320domain: NAppears in sequencesNumber of permutations satisfying i-2<=p(i)<=i+6, i=1..n.at n=11A072853a(0) = 19; for n>0, successively subtract 5, subtract 3 and double.at n=45A106706a(n) = (n-2)*2^(n-1) + n + 2.at n=14A343291