A065690 - cp's OEIS frontend

A065690 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.

%I A065690 #5 Sep 17 2023 21:34:32
%S A065690 0,10,90,410,12090,4699590,1762700012090,60424089429999995300410,
%T A065690 163858711658690481272000000000001762700012090,
%U A065690 284443295612274221167414335130587074570377999999999999999999999939575910570000004699590
%N A065690 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 A065690 a(n) = 10*A050635(n-1) for n > 1; a(n) = sqrt(A065689(n)).
%Y A065690 Cf. A050634, A050635, A061359, A065689, A065691.
%K A065690 base,nonn
%O A065690 1,2
%A A065690 _Klaus Brockhaus_, Nov 17 2001

cp's OEIS Frontend

A065690 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.