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A055011 a(n+1) = next smallest prime beginning with a(n) when written in binary, starting with 2. 4
2, 5, 11, 23, 47, 191, 383, 3067, 12269, 196307, 6281839, 50254717, 201018869, 804075479, 1608150959, 102921661397 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

a(5)=191 because a(4)=47 which in binary is 101111, none of 1011110(94) 1011111(95) 10111100(188) 10111101(189) 10111110 (190) are prime, but 10111111(191) is.

LINKS

Table of n, a(n) for n=0..15.

FORMULA

a(n+1) = A208241(a(n)). - Reinhard Zumkeller, Feb 14 2013

PROG

(Haskell)

a055011 n = a055011_list !! n

a055011_list = iterate a208241 2  -- Reinhard Zumkeller, Feb 14 2013

CROSSREFS

Cf. A048549 for base 10 analog.

A055011, A261200 and A261201 are all essentially the same sequence.

Sequence in context: A055496 A105120 A084403 * A261201 A007505 A246492

Adjacent sequences:  A055008 A055009 A055010 * A055012 A055013 A055014

KEYWORD

base,easy,more,nonn

AUTHOR

Henry Bottomley, May 31 2000

STATUS

approved

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Last modified July 28 14:35 EDT 2016. Contains 275139 sequences.