id:A077811 - OEIS Search Results

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Euler's totient of numbers containing in their decimal representation only the digits 0 and 1.

+0
1

1, 4, 10, 40, 100, 40, 72, 400, 720, 400, 672, 400, 732, 288, 1000, 4000, 9792, 2880, 6440, 4000, 5184, 2688, 10110, 4000, 6912, 2928, 7920, 2880, 10432, 4000, 10800, 40000, 90900, 39168, 59904, 28800, 65520, 25760, 86040, 40000, 66560, 20736 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = A000010(A007088(n)).`
	EXAMPLE	`a(20) = A000010(A007088(20)) = A000010(10100) = A000010(2255101) = 10100(1-1/2)(1-1/5)*(1-1/101) = 4000.`
	CROSSREFS	`Sequence in context: A149203 A038168 A100307 this_sequence A136855 A136860 A136859` `Adjacent sequences: A077808 A077809 A077810 this_sequence A077812 A077813 A077814`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 16 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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