451725120domain: NAppears in sequencesNumber of simplices in barycentric subdivision of n-simplex.at n=6A005463a(n) = 7^n - 6*6^n + 15*5^n - 20*4^n + 15*3^n - 6*2^n + 1.at n=11A228909Triangle read by rows: the positive terms of A163626.at n=39A249163