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URL: https://oeis.org/A139106

⇱ A139106 - OEIS

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A139106
Bisection of A139101.
1
10, 100101, 100101011101, 100101011101011101, 1001010111010111010111011111, 100101011101011101011101111101011111, 100101011101011101011101111101011111011101, 1001010111010111010111011111010111110111010111011111, 100101011101011101011101111101011111011101011101111101111101, 1001010111010111010111011111010111110111010111011111011111010111110111, 100101011101011101011101111101011111011101011101111101111101011111011101011111, 1001010111010111010111011111010111110111010111011111011111010111110111010111110111011111
OFFSET
1,1
FORMULA
a(n) = A139101(2n). - R. J. Mathar, Apr 25 2008
MAPLE
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: A139106 := proc(n) A139101(2*n) ; end: seq(A139106(n), n=1..12) ; # R. J. Mathar, Apr 25 2008
CROSSREFS
Cf. A139101.
Sequence in context: A115673 A225720 A013792 * A307927 A198479 A080264
KEYWORD
easy,nonn,base,less
AUTHOR
Omar E. Pol, Apr 08 2008
EXTENSIONS
More terms from R. J. Mathar, Apr 25 2008
STATUS
approved