id:A071793 - OEIS Search Results

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Decimal expansion of the fifth (of 10) decimal selvage number; the n-th digit of a decimal selvage number, x, is equal to the tenths digit of n*x.

+0
6

4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 9, 4 (list; cons; graph; listen)

	OFFSET	`0,1`
	COMMENT	`The selvage number, x = sum{k=1..inf} a(k)/10^k, is a normal number, but it is not known whether or not x is irrational. Is this sequence periodic?`
	FORMULA	`a(n) = floor[10(nx)] (Mod 10), where x = sum{k=1..inf} a(k)/10^k.`
	EXAMPLE	`a(5) = 4 since floor(10(5x)) = 4, x=.49494949494949494948383838383838383838372727272727...`
	CROSSREFS	`Sequence in context: A068950 A021673 A141653 this_sequence A010714 A089090 A113484` `Adjacent sequences: A071790 A071791 A071792 this_sequence A071794 A071795 A071796`
	KEYWORD	`cons,nice,nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jun 06 2002`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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