665917domain: NAppears in sequencesNumbers k such that A127483(k) = A127483(k+1) - 1 = A127483(k+2) - 2 = A127483(k+3) - 3.at n=23A127486Number of 2 X 2 matrices having all terms in {1,...,n} and positive determinant.at n=33A211059