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Search: id:A139145
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A139145 a(1) = 1, a(2*n) = a(n)^2, a(2*n+1) = a(n)*(a(n)+1). +0
2
1, 1, 2, 1, 2, 4, 6, 1, 2, 4, 6, 16, 20, 36, 42, 1, 2, 4, 6, 16, 20, 36, 42, 256, 272, 400, 420, 1296, 1332, 1764, 1806, 1, 2, 4, 6, 16, 20, 36, 42, 256, 272, 400, 420, 1296, 1332, 1764, 1806, 65536, 65792, 73984, 74256, 160000, 160400, 176400, 176820, 1679616 (list; graph; listen)
OFFSET

1,3

COMMENT

a(2^n - 1) = A007018(n-1).

CROSSREFS

Sequence in context: A050042 A166578 A138256 this_sequence A058553 A112179 A038067

Adjacent sequences: A139142 A139143 A139144 this_sequence A139146 A139147 A139148

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 10 2008

page 1

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.


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