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Search: id:A156202
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| A156202 |
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a(n)=2*a(n-1)+3, with a(1)=10 |
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+0
1
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| 10, 23, 49, 101, 205, 413, 829, 1661, 3325, 6653, 13309, 26621, 53245, 106493, 212989, 425981, 851965, 1703933, 3407869, 6815741, 13631485, 27262973, 54525949, 109051901, 218103805, 436207613, 872415229, 1744830461, 3489660925
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OFFSET
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1,1
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COMMENT
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Also, let p=13, prime number, then a(n)=p*2^n-3; n=0, a(0)=13*1-3=10; n=(1), a(1)=13*2-3=23; n=2, a(2)=13*2^2-3=49;
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FORMULA
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a(n) 2*a(n-1)+3, with a(1)=10
a(n)=-3+13*2^(n-1), with n>=1 [From Paolo P. Lava (ppl(AT)spl.at), Mar 04 2009]
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EXAMPLE
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n=2, a(2)=2*10+3=23; n=3, a(3)=2*23+3=49
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CROSSREFS
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Sequence in context: A140674 A072245 A135277 this_sequence A164578 A102089 A133503
Adjacent sequences: A156199 A156200 A156201 this_sequence A156203 A156204 A156205
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KEYWORD
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nonn
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AUTHOR
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Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Feb 08 2009
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EXTENSIONS
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Definition corrected by Paolo P. Lava (ppl(AT)spl.at), Feb 13 2009
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