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A152298
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A threes sequence that gets more even factors out: a(n)=(3^n - 1)/(2^(3 - 2*Mod[n, 2])).
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0
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0, 1, 1, 13, 10, 121, 91, 1093, 820, 9841, 7381, 88573, 66430, 797161, 597871, 7174453, 5380840, 64570081, 48427561, 581130733, 435848050, 5230176601, 3922632451, 47071589413, 35303692060, 423644304721, 317733228541
(list; graph; refs; listen; history; internal format)
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