G.f.: (1+x^6)/((1-x)*(1-x^3)*(1-x^4)). 1, 1, 1, 2, 3, 3, 5, 6, 7, 9, 11, 12, 15, 17, 19, 22, 25, 27, 31, 34, 37, 41, 45, 48, 53, 57
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