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A121911
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First four terms are decimal digits of 1979. Rest are found by adding four previous terms modulo 10.
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0
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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; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Sequence is periodic with period length 1560. a(n) is even iff n is a multiple of 5. - (Klaus Brockhaus, Sep 06 2006)
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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)
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CROSSREFS
| Sequence in context: A199003 A199048 A094132 * A010547 A011405 A131724
Adjacent sequences: A121908 A121909 A121910 * A121912 A121913 A121914
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KEYWORD
| easy,nonn,base
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AUTHOR
| Stephen J Sugden (ssugden(AT)gmail.com), Sep 02 2006
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EXTENSIONS
| Extended by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Sep 06 2006
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