id:A077807 - OEIS Search Results

Search: id:A077807

Displaying 1-1 of 1 results found.

page 1

Number of distinct prime factors of numbers containing in their decimal representation only the digits 0 and 1.

+0
2

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

	OFFSET	`1,2`
	FORMULA	`a(n) = A001221(A007088(n)).`
	EXAMPLE	`a(36) = A001221(A007088(36)) = A001221(100100) = A001221(225571113) = 5.`
	CROSSREFS	`Cf. A077808.` `Sequence in context: A076649 A157235 A086289 this_sequence A112309 A160006 A060682` `Adjacent sequences: A077804 A077805 A077806 this_sequence A077808 A077809 A077810`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 16 2002`

page 1

Search completed in 0.002 seconds

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research