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Search: id:A164654
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| A164654 |
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a(n) = 2*a(n-2) for n > 2; a(1) = 3, a(2) = 8. |
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+0
6
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| 3, 8, 6, 16, 12, 32, 24, 64, 48, 128, 96, 256, 192, 512, 384, 1024, 768, 2048, 1536, 4096, 3072, 8192, 6144, 16384, 12288, 32768, 24576, 65536, 49152, 131072, 98304, 262144, 196608, 524288, 393216, 1048576, 786432, 2097152, 1572864, 4194304, 3145728
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Interleaving of A007283 and A000079 without initial terms 1, 2, 4.
Binomial transform is A164303.
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FORMULA
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a(n) = (7+(-1)^n)*2^(1/4*(2*n-5+(-1)^n)).
G.f.: x*(3+8*x)/(1-2*x^2).
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PROGRAM
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(MAGMA) [ n le 2 select 5*n-2 else 2*Self(n-2): n in [1..41] ];
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CROSSREFS
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Cf. A007283 (3*2^n), A000079 (powers of 2), A164303.
Sequence in context: A080939 A155724 A098737 this_sequence A072396 A001175 A093725
Adjacent sequences: A164651 A164652 A164653 this_sequence A164655 A164656 A164657
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KEYWORD
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nonn
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AUTHOR
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Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Aug 20 2009
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EXTENSIONS
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G.f. corrected by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Sep 18 2009
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