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A146561 Numbers m with the property that shifting the rightmost digit of m to the left end multiplies the number by 3. 8

%I

%S 1034482758620689655172413793,1379310344827586206896551724,

%T 1724137931034482758620689655,2068965517241379310344827586,

%U 2413793103448275862068965517,2758620689655172413793103448,3103448275862068965517241379,10344827586206896551724137931034482758620689655172413793

%N Numbers m with the property that shifting the rightmost digit of m to the left end multiplies the number by 3.

%H Seiichi Manyama, <a href="/A146561/b146561.txt">Table of n, a(n) for n = 1..245</a>

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Parasitic_number">Parasitic number</a>.

%F From _Seiichi Manyama_, Aug 22 2017: (Start)

%F a(7*k - 6) = 3*(10^(28*k) - 1)/29.

%F a(7*k - 5) = 4*(10^(28*k) - 1)/29.

%F a(7*k - 4) = 5*(10^(28*k) - 1)/29.

%F a(7*k - 3) = 6*(10^(28*k) - 1)/29.

%F a(7*k - 2) = 7*(10^(28*k) - 1)/29.

%F a(7*k - 1) = 8*(10^(28*k) - 1)/29.

%F a(7*k) = 9*(10^(28*k) - 1)/29. (End)

%Y Cf. A146088 (k=2), this sequence (k=3), A146569 (k=4), A146754 (k=5), A291354 (k=6), A291215 (k=7), A291321 (k=8), A291353 (k=9).

%Y Cf. A092697, A097717.

%K nonn,base,easy

%O 1,1

%A _N. J. A. Sloane_, based on correspondence from William A. Hoffman III (whoff(AT)robill.com), Apr 10 2009

%E More terms from _Seiichi Manyama_, Aug 22 2017

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Last modified September 21 22:38 EDT 2017. Contains 292326 sequences.