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A078589
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a(1)=0, a(2)=1, a(n)=abs(abs(a(n-1))-a(n-2)-n+1).
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0
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0, 1, 1, 3, 2, 6, 2, 11, 1, 19, 8, 22, 2, 33, 17, 31, 2, 46, 26, 39, 7, 53, 24, 52, 4, 73, 43, 57, 14, 72, 28, 75, 15, 93, 44, 84, 4, 117, 75, 81, 34, 88, 12, 119, 63, 101, 8, 140, 84, 105, 29, 127, 46, 134, 34, 155, 65, 147, 24, 182, 98, 145, 15, 193, 114, 144, 36, 175
(list; graph; refs; listen; history; internal format)
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