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A330818
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Numbers of the form 2^(2*p+1), where p is a Mersenne exponent, A000043.
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7
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32, 128, 2048, 32768, 134217728, 34359738368, 549755813888, 9223372036854775808, 10633823966279326983230456482242756608, 766247770432944429179173513575154591809369561091801088
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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EXAMPLE
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a(1) = 2^(2*2+1) = 32. Since M_2=3, the number 2^5*3^2 has power-spectral basis {225,64}.
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MAPLE
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for www to 1 do
for i from 1 to 31 do
#ithprime(31)=127
p:=ithprime(i);
q:=2^p-1;
od;
od;
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MATHEMATICA
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2^(2 * MersennePrimeExponent[Range[10]] + 1) (* Amiram Eldar, Jan 03 2020 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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