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A330819
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Numbers of the form M_p^2(M^p+2)^2, where M_p is a Mersenne prime (A000668) and p is a Mersenne exponent (A000043). Also the first element of the spectral basis of A330817.
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10
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225, 3969, 1046529, 268402689, 4503599493152769, 295147905144993087489, 75557863725364567605249, 21267647932558653957237540927630737409, 28269553036454149273332760011886696242605918383730576346715242738439159809
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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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If p=2, then M_2=3, and a(1) = 3^2(3+2)^2 = 15^2 = 225.
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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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(m = 2^MersennePrimeExponent[Range[9]] - 1)^2 * (m + 2)^2 (* 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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