Number A(n,k) of n-digit k-th powers; square array A(n,k), n>=1, k>=1, read by antidiagonals.

Terms

a(0) =10a(1) =4a(2) =90a(3) =3a(4) =6a(5) =900a(6) =2a(7) =2a(8) =22a(9) =9000a(10) =2a(11) =2a(12) =5a(13) =68a(14) =90000a(15) =2a(16) =1a(17) =2a(18) =12a(19) =217a(20) =900000a(21) =2a(22) =1a(23) =1a(24) =4a(25) =25a(26) =683a(27) =9000000a(28) =2a(29) =0