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A065788 a(1) = 64; for n > 1 is a(n) the smallest square > a(n-1) with a(n-1) forming its final digits. 3
64, 1764, 6041764, 96126041764, 8584885596126041764, 1094573934406914368584885596126041764, 164840278246153785356947805564195221094573934406914368584885596126041764 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

LINKS

Table of n, a(n) for n=1..7.

MATHEMATICA

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 *)

CROSSREFS

A050634, A050636, A065689, A065789, A065790.

Sequence in context: A017115 A269203 A005609 * A264275 A283689 A226010

Adjacent sequences:  A065785 A065786 A065787 * A065789 A065790 A065791

KEYWORD

base,nonn

AUTHOR

Klaus Brockhaus, Nov 19 2001

STATUS

approved

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Last modified October 27 20:18 EDT 2021. Contains 348290 sequences. (Running on oeis4.)