id:A071792 - OEIS Search Results

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Decimal expansion of the fourth (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

3, 7, 1, 4, 8, 2, 6, 9, 3, 7, 0, 4, 8, 2, 5, 9, 3, 6, 0, 4, 8, 1, 5, 9, 2, 6, 0, 4, 7, 1, 5, 8, 2, 6, 0, 3, 7, 1, 4, 8, 2, 6, 9, 3, 7, 0, 4, 8, 2, 5, 9, 3, 6, 0, 4, 8, 1, 5, 9, 2, 6, 0, 4, 7, 1, 5, 8, 2, 6, 0, 3, 7, 1, 4, 8, 2, 6, 9, 3, 7, 0, 4, 8, 2, 5, 9, 3, 6, 0, 4, 8, 1, 5, 9, 2, 6, 0, 4, 7, 1 (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) = 8 since floor(10(5x)) = 8, x=.37148269370482593604815926047158260371482693704825...`
	CROSSREFS	`Sequence in context: A019631 A023527 A016664 this_sequence A010781 A019806 A080172` `Adjacent sequences: A071789 A071790 A071791 this_sequence A071793 A071794 A071795`
	KEYWORD	`cons,nice,nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jun 06 2002`

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Last modified December 4 08:07 EST 2009. Contains 170310 sequences.

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