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A082791 Smallest k such that k*n begins with 2: a(n) = A082811(n)/n. 2

%I #11 Dec 05 2013 19:56:13

%S 2,1,7,5,4,4,3,3,3,2,2,2,2,2,14,13,12,12,11,1,1,1,1,1,1,1,1,1,1,7,7,7,

%T 7,6,6,6,6,6,6,5,5,5,5,5,5,5,5,5,5,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,

%U 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3

%N Smallest k such that k*n begins with 2: a(n) = A082811(n)/n.

%C a(n) is in {1, 2, 3, 4, 5, 6, 7, 11, 12, 13, 14}. [_Charles R Greathouse IV_, Mar 06 2011]

%H Zak Seidov, <a href="/A082791/b082791.txt">Table of n, a(n) for n = 1..1000</a>

%o (PARI) a(n)=forstep(k=n, 14*n, n, if(Vec(Str(k))[1]=="2", return(k/n))) \\ _Charles R Greathouse IV_, Mar 06 2011

%Y Cf. A082784, A054850, A082786, A082787, A082788, A082789, A082811.

%K base,easy,nonn

%O 1,1

%A _Amarnath Murthy_, Apr 19 2003

%E More terms from _Zak Seidov_, Mar 06 2011

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Last modified August 12 15:11 EDT 2024. Contains 375113 sequences. (Running on oeis4.)