|
%I #13 Nov 17 2014 09:40:47
%S 8,81,81225,8122515625,812251562541751472569,
%T 812251562541751472569881528811450814530084
%N a(n+1) is next smallest square not divisible by 10 beginning with a(n), initial term is 8.
%H Hiroaki Yamanouchi, <a href="/A249898/b249898.txt">Table of n, a(n) for n = 1..10</a>
%o (PARI) a(n)=k=n; s=1; while(s<5*10^7, if(s%10, if(s^2\(10^(#Str(s^2)-#Str(k)))==k, print1(s^2, ", "); k=s^2)); s++)
%o a(8)
%o (Python)
%o def f(x):
%o ..print(x, end=', ')
%o ..n = x
%o ..s = 1
%o ..while s < 10**7:
%o ....if s % 10:
%o ......S = str(s**2)
%o ......if S.startswith(str(n)):
%o ........print(s**2, end=', ')
%o ........n = s**2
%o ....s += 1
%o f(8)
%Y Cf. A048559, A048561.
%K nonn,base
%O 1,1
%A _Derek Orr_, Nov 08 2014
|
