A065780 - cp's OEIS frontend

A065780 a(1) = 5; 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 A065780 #8 Sep 17 2023 21:31:33
%S A065780 5,15,35,285,4035,2660285,40530004035,478354453999997339715,
%T A065780 31246194523464509984000000000040530004035,
%U A065780 8209490213224904365731763888026434805200000000000000000000478354453999997339715
%N A065780 a(1) = 5; 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.
%Y A065780 Cf. A050635, A065690, A061839, A065781.
%K A065780 base,nonn
%O A065780 1,1
%A A065780 _Klaus Brockhaus_, Nov 19 2001
%E A065780 More terms from Ulrich Schimke (ulrschimke(AT)aol.com), Dec 18 2001

cp's OEIS Frontend

A065780 a(1) = 5; 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.