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%I #5 Mar 30 2012 17:27:49
%S 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,
%T 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,
%U 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
%N First four terms are decimal digits of 1979. Rest are found by adding four previous terms modulo 10.
%C Sequence is periodic with period length 1560. a(n) is even iff n is a multiple of 5. - (Klaus Brockhaus, Sep 06 2006)
%F 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)
%K easy,nonn,base
%O 1,2
%A Stephen J Sugden (ssugden(AT)gmail.com), Sep 02 2006
%E Extended by _Klaus Brockhaus_, Sep 06 2006
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