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A156641
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13*(100^(n+1)-1)/99.
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1
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13, 1313, 131313, 13131313, 1313131313, 131313131313, 13131313131313, 1313131313131313, 131313131313131313, 13131313131313131313, 1313131313131313131313, 131313131313131313131313
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..100
Index to sequences with linear recurrences with constant coefficients, signature (101,-100).
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FORMULA
| G.f.: 13*x / ( (1-100*x)*(1-x) ).
a(n) = 13*A094028(n-1).
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EXAMPLE
| For n=0, a(0)=13; n=1, a(1)=1313; n=2, a(2)=131313; n=3, a(3)=13131313
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MATHEMATICA
| Table[FromDigits[PadLeft[{1, 3}, 2n, {1, 3}]], {n, 15}] (* From Harvey P. Dale, Jul 23 2011 *)
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PROG
| (MAGMA) [13*(100^(n+1)-1)/99: n in [0..15]]
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CROSSREFS
| Cf. A094028
Sequence in context: A201265 A178560 A091781 * A197630 A196966 A203369
Adjacent sequences: A156638 A156639 A156640 * A156642 A156643 A156644
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KEYWORD
| nonn,easy
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AUTHOR
| Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Feb 15 2009
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EXTENSIONS
| Offset changed from 1 to 0
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