id:A096503 - OEIS Search Results

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Euler-phi of these numbers is a decimal repdigit.

+0
15

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 23, 24, 30, 46, 67, 69, 89, 92, 115, 134, 138, 178, 184, 223, 230, 276, 446, 669, 892, 1043, 1115, 1338, 1341, 1784, 2086, 2230, 2676, 2682, 446669, 666667, 893338, 895043, 902423, 1333334, 1340007, 1786676 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`n=88888892, A000010(n)=44444444;` `Regular solutions: if x=repdigit+1 is prime,` `then phi[x]=repdigit.`
	CROSSREFS	`Adjacent sequences: A096500 A096501 A096502 this_sequence A096504 A096505 A096506` `Sequence in context: A002473 A161466 A117296 this_sequence A055238 A100952 A030477`
	KEYWORD	`base,nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Jul 12 2004`

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Last modified November 8 07:45 EST 2009. Contains 166143 sequences.

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