id:A069159 - OEIS Search Results

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a(n) = d(1) - d(2) + d(3) - d(4) + ... + (-1)^(n+1) d(n), where d(k) denotes the k-th term of the digit sequence 3, 1, 4, 1, 5, 9,.... of Pi.

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3, 2, 6, 5, 10, 1, 3, -3, 2, -1, 4, -4, 5, -2, 7 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`K. S. Brown, Random Walk Through Pi`
	FORMULA	`a(1) = d(1) = 3; a(n) = a(n-1) + (-1)^(n+1) d(n) for n > 1.`
	EXAMPLE	`a(3) = d(1) - d(2) + d(3) = 3 - 1 + 4 = 6.`
	CROSSREFS	`Sequence in context: A046877 A067587 A120476 this_sequence A085179 A113782 A090868` `Adjacent sequences: A069156 A069157 A069158 this_sequence A069160 A069161 A069162`
	KEYWORD	`base,easy,sign`
	AUTHOR	`Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Apr 09 2002`

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Last modified December 17 13:29 EST 2009. Contains 170826 sequences.