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Search: id:A139107
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| 1, 9, 599, 38359, 2454999, 628479869, 643563386359, 41188056726999, 168706280353789919, 43188807770570219359, 2764083697316494039005, 2830421706052089895941623, 46373629231957440855107559295
(list; graph; listen)
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OFFSET
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1,2
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MAPLE
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A139101 := proc(n) option remember ; local a, p; if n = 1 then RETURN(1); else a := 10*A139101(n-1) ; for p from ithprime(n-1)+1 to ithprime(n)-1 do a := 10*a+1 ; od: fi ; RETURN(a) ; end: bin2dec := proc(n) local nshft ; nshft := convert(n, base, 10) ; add(op(i, nshft)*2^(i-1), i=1..nops(nshft) ) ; end: A139102 := proc(n) bin2dec(A139101(n)) ; end: A139107 := proc(n) A139102(2*n-1) ; end: seq(A139107(n), n=1..35) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 25 2008
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CROSSREFS
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Cf. A139102.
Sequence in context: A067320 A061611 A015092 this_sequence A085530 A158881 A157597
Adjacent sequences: A139104 A139105 A139106 this_sequence A139108 A139109 A139110
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KEYWORD
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nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Apr 08 2008
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 25 2008
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