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Search: id:A083416
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| A083416 |
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Add 1, double, add 1, double, etc. |
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+0
2
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| 1, 2, 4, 5, 10, 11, 22, 23, 46, 47, 94, 95, 190, 191, 382, 383, 766, 767, 1534, 1535, 3070, 3071, 6142, 6143, 12286, 12287, 24574, 24575, 49150, 49151, 98302, 98303, 196606, 196607, 393214, 393215, 786430, 786431, 1572862, 1572863
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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G.f. (1+2x+x^2-x^3)/(1-x^2)/(1-2x^2). a(2n) = 3*2^(n-1)-1, a(2n+1) = 3*2^n-2.
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CROSSREFS
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a(n) = A081026(n+1)-1.
Sequence in context: A128216 A080735 A091856 this_sequence A022770 A141481 A047611
Adjacent sequences: A083413 A083414 A083415 this_sequence A083417 A083418 A083419
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KEYWORD
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easy,nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jun 10 2003
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EXTENSIONS
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More terms from Donald Sampson (marsquo(AT)hotmail.com), Dec 04 2003
Corrected by T. D. Noe (noe(AT)sspectra.com), Nov 02 2006
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