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Search: id:A001601
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| A001601 |
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a(n) = 2*a(n-1)^2 - 1, if n>1. a(0)=1, a(1)=3. (Formerly M3042 N1234)
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+0 7
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| 1, 3, 17, 577, 665857, 886731088897, 1572584048032918633353217, 4946041176255201878775086487573351061418968498177
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