110935domain: NAppears in sequencesa(n) = (2*n - 1)*(8*n^2 - 8*n + 3)/3.at n=27A063496Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and the total absolute value of displacements not greater than n.at n=13A263934Numbers k such that k^4*2^k - 1 is a prime.at n=21A367102