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%I #5 Sep 17 2023 21:34:32
%S 0,10,90,410,12090,4699590,1762700012090,60424089429999995300410,
%T 163858711658690481272000000000001762700012090,
%U 284443295612274221167414335130587074570377999999999999999999999939575910570000004699590
%N a(1) = 0; for n > 1, a(n) is the square root of the smallest square > a(n-1)^2 with a(n-1)^2 forming its final digits.
%C a(n) = 10*A050635(n-1) for n > 1; a(n) = sqrt(A065689(n)).
%Y Cf. A050634, A050635, A061359, A065689, A065691.
%K base,nonn
%O 1,2
%A _Klaus Brockhaus_, Nov 17 2001