66850domain: NAppears in sequencesSecond elementary symmetric function of 3,4,...,n+3.at n=23A024183Number of symmetric 4 X 4 matrices of nonnegative integers with every row and column adding to n.at n=11A053493Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=34A207106