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A249895
a(n+1) is next smallest square not divisible by 10 beginning with a(n), initial term is 5.
5
5, 529, 529984, 52998485796, 5299848579629072273476, 529984857962907227347600150092608188876380736
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(5)
(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(5)
CROSSREFS
Sequence in context: A110721 A219164 A067446 * A241325 A210821 A302222
KEYWORD
nonn,base
AUTHOR
Derek Orr, Nov 08 2014
STATUS
approved