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A053079
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a(1)=1; a(m+1)= sum{k=1 to m} [GCD(k, a(m+1-k))].
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0
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1, 1, 2, 3, 5, 5, 9, 7, 9, 17, 15, 13, 17, 15, 27, 33, 21, 27, 29, 29, 35, 33, 29, 45, 55, 51, 73, 41, 59, 61, 57, 39, 63, 57, 59, 85, 49, 87, 65, 65, 77, 93, 83, 107, 117, 73, 91, 95, 137, 97, 117, 125, 115, 131
(list; graph; refs; listen; history; internal format)
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