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A115059
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a(n+4) = a(n+3)+a(n+1)+a(n)+k(n), where k(n) = 0, 1, 0, or -1 according to n mod 4.
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0
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0, 0, 1, 1, 1, 3, 5, 6, 10, 19, 30, 45, 74, 124, 199, 317, 515, 839, 1355, 2186, 3540, 5735, 9276, 15001, 24276, 39288, 63565, 102841, 166405, 269259, 435665, 704910, 1140574, 1845499, 2986074, 4831557, 7817630, 12649204, 20466835, 33116021
(list; graph; refs; listen; history; internal format)
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