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A240983 Integers of the form 2^p*p^2 where p is the lesser of a pair of twin primes. 2

%I

%S 72,800,247808,37879808,451508436992,3696558092582912,

%T 2006659878768217161728,11902724720072940761120768,

%U 25862607545856336249335738796081152,1857706460417663797470176639788777472,3270020989306416138620967939526071071138643968

%N Integers of the form 2^p*p^2 where p is the lesser of a pair of twin primes.

%C Subsequence of A071837.

%H Chai Wah Wu, <a href="/A240983/b240983.txt">Table of n, a(n) for n = 1..86</a>

%F a(n) = 2^p*p^2, with p=A001359(n).

%F a(n) = A007758(A001359(n)). - _Michel Marcus_, Aug 21 2014

%e a(1)=2^3*3^2=72=A071837(3), a(4)=2^17*17^2=37879808=A071837(10).

%o (PARI) forprime(p=3,100,isprime(2+p) && print1(p","))

%o (Python)

%o from sympy import prime, isprime

%o A240983 = [2**p*p*p for p in (prime(n) for n in range(1,2*10**3)) if isprime(p+2)] # _Chai Wah Wu_, Aug 27 2014

%Y Cf. A001359, A071837.

%K nonn

%O 1,1

%A _Zak Seidov_, Aug 21 2014

%E More terms from _Chai Wah Wu_, Aug 27 2014

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Last modified October 18 22:03 EDT 2019. Contains 328211 sequences. (Running on oeis4.)