560196domain: NAppears in sequencesSquare array read by antidiagonals downwards: super Patalan numbers of order 6.at n=16A248328Riordan array (1/(1-9x)^(1/3), x/(9x-1)).at n=30A283150Constant term in the expansion of (Sum_{k=0..n} k*(x^k + x^(-k)))^3.at n=19A303916a(n) = Product_{d|n, d>1} (d - 1).at n=39A377484