A065790 -id:A065790 - cp's OEIS frontend

A065789 a(1) = 8; 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.

8, 42, 2458, 310042, 2929997542, 1046218875000310042, 406005268741864709999999997070002458, 50376698115810287966925579573179705000000000000000001046218875000310042

Offset: 1

Klaus Brockhaus, Nov 19 2001

a(n) = A050637(n+1) for n >= 1; a(n) = sqrt(A065788(n)).

Essentially the same as A050637. - Zak Seidov, Mar 12 2012

Cf. A050635, A050637, A065690, A065788, A065790.

A065788 a(1) = 64; for n > 1 a(n) is the smallest square > a(n-1) with a(n-1) forming its final digits.

Original entry on oeis.org

64, 1764, 6041764, 96126041764, 8584885596126041764, 1094573934406914368584885596126041764, 164840278246153785356947805564195221094573934406914368584885596126041764

Offset: 1

Klaus Brockhaus, Nov 19 2001

a(n) = A050636(n+1) for n >= 1.

A050634, A050636, A065689, A065789, A065790.

nxt[n_]:=Module[{k=1},While[!IntegerQ[Sqrt[k*10^IntegerLength[n]+n]],k++];k*10^IntegerLength[n]+n]; NestList[nxt,64,6] (* Harvey P. Dale, Dec 14 2019 *)

cp's OEIS Frontend

A065789 a(1) = 8; 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.

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