id:A121911 - OEIS Search Results

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A121911

First four terms are decimal digits of the year 1979. Rest are found by adding four previous terms modulo 10.

+0
1

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

	OFFSET	`1,2`
	COMMENT	`Sequence is periodic with period length 1560. a(n) is even iff n is a multiple of 5. - (Klaus Brockhaus, Sep 06 2006)`
	FORMULA	`a(1) = 1, a(2) = 9, a(3) = 7, a(4) = 9; for n >= 5, a(n) = (a(n-1) + a(n-2) + a(n-3) + a(n-4)) (mod 10)`
	CROSSREFS	`Sequence in context: A011359 A154827 A094132 this_sequence A010547 A011405 A131724` `Adjacent sequences: A121908 A121909 A121910 this_sequence A121912 A121913 A121914`
	KEYWORD	`easy,nonn`
	AUTHOR	`Stephen J Sugden (ssugden(AT)gmail.com), Sep 02 2006`
	EXTENSIONS	`Extended by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Sep 06 2006`

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

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