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A144780
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Variant of Sylvester's sequence: a(n+1) = a(n)^2 - a(n) + 1, with a(1) = 6
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17
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6, 31, 931, 865831, 749662454731, 561993796032558961827631, 315837026779085485103718410756049100028793244531, 99753027484652761836825641888570160231510113732060091990981400322237526237557946030593168165431
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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FORMULA
| a(n) =2.3501173840227600761297234072489259892263059050240357974853352556611926547880255842598296448435697^(2^n) a(n+1) = a(n)^2 - a(n) + 1, with a(1) = 6
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MATHEMATICA
| a = {}; k = 6; Do[AppendTo[a, k]; k = k^2 - k + 1, {n, 1, 10}]; a or Table[Round[2.3501173840227600761297234072489259892263059050240357974853352556611926547880255842598296448435697^(2^n)], {n, 1, 8}] (*Artur Jasinski*)
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CROSSREFS
| A000058, A082732, A144779, A144780, A144781, A144782, A144783, A144784, A144785, A144786, A144787, A144788
Sequence in context: A120107 A015462 A006115 * A126976 A045159 A121002
Adjacent sequences: A144777 A144778 A144779 * A144781 A144782 A144783
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KEYWORD
| nonn
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Sep 21 2008
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