id:A078832 - OEIS Search Results

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Smallest prime contained as binary substring in binary representation of n>1, a(1)=1.

+0
2

1, 2, 3, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n)<=3 and for n>1: a(n)>=2 and a(n)=3 iff n=2^k-1, k>1.`
	CROSSREFS	`Cf. A078833, A078826, A078822, A007088, A020639.` `Adjacent sequences: A078829 A078830 A078831 this_sequence A078833 A078834 A078835` `Sequence in context: A078545 A111497 A097051 this_sequence A086410 A103266 A072814`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 08 2002`

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Last modified October 15 09:18 EDT 2008. Contains 145015 sequences.

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