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A048491
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a(n)=T(8,n), array T given by A048483.
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1
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1, 10, 28, 64, 136, 280, 568, 1144, 2296, 4600, 9208, 18424, 36856, 73720, 147448, 294904, 589816, 1179640, 2359288, 4718584, 9437176, 18874360, 37748728, 75497464, 150994936, 301989880, 603979768, 1207959544, 2415919096
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| 9 * 2^n - 8. - Ralf Stephan
Equals binomial transform of [1, 9, 9, 9,...]. - Gary W. Adamson (qntmpkt(AT)yahoo.com), Apr 29 2008
a(n)=2*a(n-1)+8 (with a(0)=1) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 06 2010]
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EXAMPLE
| For n=1, a(1)=2*1+8=10; n=2, a(2)=2*10+8=28; n=3, a(3)=2*28+8=64 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 06 2010]
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MATHEMATICA
| a=1; lst={a}; k=9; Do[a+=k; AppendTo[lst, a]; k+=k, {n, 0, 5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Dec 16 2008]
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CROSSREFS
| n-th difference of a(n), a(n-1), ..., a(0) is (9, 9, 9, ...).
Sequence in context: A169879 A054112 A053790 * A124703 A126364 A076712
Adjacent sequences: A048488 A048489 A048490 * A048492 A048493 A048494
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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