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A249894
a(n+1) is next smallest square not divisible by 10 beginning with a(n), initial term is 3.
5
3, 36, 361, 361201, 36120142809, 3612014280924268428225, 361201428092426842822525044572369542546150009
OFFSET
1,1
LINKS
Hiroaki Yamanouchi, Table of n, a(n) for n = 1..10
PROG
(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++)
a(3)
(Python)
def f(x):
..print(x, end=', ')
..n = x
..s = 1
..while s < 10**7:
....if s % 10:
......S = str(s**2)
......if S.startswith(str(n)):
........print(s**2, end=', ')
........n = s**2
....s += 1
f(3)
CROSSREFS
Sequence in context: A055303 A274403 A068177 * A099670 A259131 A199258
KEYWORD
nonn,base
AUTHOR
Derek Orr, Nov 08 2014
EXTENSIONS
a(7) corrected by Hiroaki Yamanouchi, Nov 17 2014
STATUS
approved