id:A078826 - OEIS Search Results

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Number of distinct primes contained as binary substrings in binary representation of n.

+0
7

0, 0, 1, 1, 1, 2, 2, 2, 1, 1, 2, 4, 2, 4, 3, 2, 1, 2, 1, 3, 2, 2, 4, 6, 2, 2, 4, 5, 3, 6, 3, 3, 1, 1, 2, 3, 1, 3, 3, 4, 2, 3, 2, 5, 4, 5, 6, 7, 2, 3, 2, 3, 4, 5, 5, 7, 3, 3, 6, 8, 3, 7, 4, 3, 1, 1, 1, 3, 2, 3, 3, 5, 1, 2, 3, 5, 3, 5, 4, 5, 2, 3, 3, 6, 2, 2, 5, 7, 4, 5, 5, 5, 6, 8, 7, 8, 2, 3, 3, 3, 2, 5, 3, 5, 4 (list; graph; listen)

	OFFSET	`0,6`
	EXAMPLE	`n=7 -> '111' contains 2 different binary substrings which are primes: '11' (11b or b11) and '111' itself, therefore a(7)=2.`
	CROSSREFS	`Cf. A078827, A078822, A007088, A001221.` `Sequence in context: A134143 A085684 A071338 this_sequence A051950 A104754 A098593` `Adjacent sequences: A078823 A078824 A078825 this_sequence A078827 A078828 A078829`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Dec 08 2002`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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