57604domain: NAppears in sequencesa(n) = 3600*n^2 + n.at n=3A157861Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,4,2,0,1,2,0 for x=0,1,2,3,4,5,6.at n=5A197914Index of first occurrence of -n in A000319, or -1 if -n never appears there.at n=16A381231