Triangular array read by rows: a(n,k) = phi(n/k)*(n/k)^k*k! if k|n else 0 (1<=k<=n).

Terms

a(0) =1a(1) =2a(2) =2a(3) =6a(4) =0a(5) =6a(6) =8a(7) =8a(8) =0a(9) =24a(10) =20a(11) =0a(12) =0a(13) =0a(14) =120a(15) =12a(16) =36a(17) =48a(18) =0a(19) =0a(20) =720a(21) =42a(22) =0a(23) =0a(24) =0a(25) =0a(26) =0a(27) =5040a(28) =32a(29) =64