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A299795
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Numbers of the form p*2^(p-1) where p is prime.
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3
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4, 12, 80, 448, 11264, 53248, 1114112, 4980736, 96468992, 7784628224, 33285996544, 2542620639232, 45079976738816, 189115999977472, 3307330976350208, 238690780250636288, 17005592192950992896, 70328211781017665536, 4943727411754159833088, 83822005070936202543104
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OFFSET
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1,1
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LINKS
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G. C. Greubel, Table of n, a(n) for n = 1..460
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FORMULA
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From Michel Marcus, Mar 07 2018: (Start)
a(n) = prime(n)*2^(prime(n)-1).
a(n) = A000040(n)*A061286(n).
a(n) = A001787(A000040(n)).
(End)
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MAPLE
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Primes := select(isprime, [$1..71]):
seq(p*2^(p-1), p in Primes);
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MATHEMATICA
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Table[Prime[n]*2^(Prime[n] -1), {n, 1, 30}] (* G. C. Greubel, Mar 07 2018 *)
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PROG
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(PARI) a(n) = my(p = prime(n)); p*2^(p-1); \\ Michel Marcus, Mar 07 2018
(Magma) [NthPrime(n)*2^(NthPrime(n) -1): n in [1..30]]; // G. C. Greubel, Mar 07 2018
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CROSSREFS
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A subsequence of A001787 and A300332.
Sequence in context: A244058 A165261 A027145 * A351736 A010370 A197852
Adjacent sequences: A299792 A299793 A299794 * A299796 A299797 A299798
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KEYWORD
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nonn
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AUTHOR
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Peter Luschny, Mar 03 2018
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STATUS
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approved
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