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A249804
a(n+1) is the next smallest nontrivial cube beginning with a(n), initial term is 4.
2
4, 4096, 409675763483, 4096757634832457594649749511342547903
OFFSET
1,1
COMMENTS
a(5) is a 110-digit number. - Jon E. Schoenfield, Dec 04 2014
LINKS
Jon E. Schoenfield, Table of n, a(n) for n = 1..7
PROG
(Python)
def f(x):
..n = x
..s = 1
..while s < 10**7:
....if s % 10:
......S = str(s**3)
......if S.startswith(str(n)):
........print(s**3, end=', ')
........n = s**3
....s += 1
f(4)
(PARI) a(n)=k=n; s=1; while(s<10^7, if(s%10, if(s^3\(10^(#Str(s^3)-#Str(k)))==k, print1(s^3, ", "); k=s^3)); s++)
a(4)
CROSSREFS
Sequence in context: A013830 A320860 A067482 * A079682 A127235 A274972
KEYWORD
nonn,base
AUTHOR
Derek Orr, Dec 03 2014
EXTENSIONS
a(4) from Jon E. Schoenfield, Dec 04 2014
STATUS
approved