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Search: id:A144864
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| 1, 21, 341, 5461, 87381, 1398101, 22369621, 357913941, 5726623061, 91625968981, 1466015503701, 23456248059221, 375299968947541, 6004799503160661, 96076792050570581, 1537228672809129301, 24595658764946068821
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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All numbers in this sequence for n>1 are congruent to 5 mod 16 [From Artur Jasinski (grafix(AT)csl.pl), Sep 25 2008]
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EXAMPLE
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a(n)=1/3 (-1 + 16^(n - 1)) + 16^(n - 1) or recurence a[n+1]=16*a[n]+5 and a[1]=1 [From Artur Jasinski (grafix(AT)csl.pl), Sep 25 2008]
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MATHEMATICA
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a = {}; k = {1}; Do[x = FromDigits[k, 2]; AppendTo[a, x]; AppendTo[k, 0]; AppendTo[k, 1]; PrependTo[k, 0]; PrependTo[k, 1], {n, 1, 100}]; a (*Artur Jasinski*)
Contribution from Artur Jasinski (grafix(AT)csl.pl), Sep 25 2008: (Start)
Table[1/3 (-1 + 16^(n - 1)) + 16^(n - 1), {n, 1, 17}]
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a = {}; k = 1; Do[AppendTo[a, k]; k = 16 k + 5, {n, 1, 17}]; a (*Artur Jasinski* ) (End)
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CROSSREFS
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A056830, A094028, A135576, A144864
Sequence in context: A166914 A020311 A068705 this_sequence A075921 A006105 A167032
Adjacent sequences: A144861 A144862 A144863 this_sequence A144865 A144866 A144867
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KEYWORD
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base,nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Sep 23 2008
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