-2598606825domain: ZAppears in sequencesTriangle T(n,k), n>=1, 0<=k<=3^n, read by rows: row n gives the coefficients of the chromatic polynomial of the Hanoi graph H_n, highest powers first.at n=27A193233Triangle read by rows: coefficients of the chromatic polynomial of the n-Hanoi graph.at n=28A288839