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Search: id:A144779
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| A144779 |
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Variant of Sylvester's sequence: a(n+1) = a(n)^2 - a(n) + 1, with a(1) = 5 |
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+0
12
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| 5, 21, 421, 176821, 31265489221, 977530816197201697621, 955566496615167328821993756200407115362021, 91310732945338459409065560514258959194455689190167413834371607297572219308277384\ 2421
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OFFSET
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1,1
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FORMULA
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a(n) =2.12799590746410705457735194814049878380944092755462023387761440825397916796276349223231^(2^n) a(n+1) = a(n)^2 - a(n) + 1, with a(1) = 5
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MATHEMATICA
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a = {}; k = 5; Do[AppendTo[a, k]; k = k^2 - k + 1, {n, 1, 10}]; a or Table[Round[2.127995907464107054577351948140498783809440927554620233877614408253\ 97916796276349223231^(2^n)], {n, 1, 8}] (*Artur Jasinski*)
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CROSSREFS
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A000058, A082732, A144779, A144781, A144781, A144782, A144783, A144784, A144785, A144786, A144787, A144788
Sequence in context: A009732 A009758 A143503 this_sequence A156860 A063619 A045015
Adjacent sequences: A144776 A144777 A144778 this_sequence A144780 A144781 A144782
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Sep 21 2008
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