A110295 a(n) = 2^(n-1) * prime(n).

2, 6, 20, 56, 176, 416, 1088, 2432, 5888, 14848, 31744, 75776, 167936, 352256, 770048, 1736704, 3866624, 7995392, 17563648, 37224448, 76546048, 165675008, 348127232, 746586112, 1627389952, 3388997632, 6912212992, 14361296896

Offset: 1

Author

Ryan Propper, Sep 07 2005

Keywords

• nonn

References

• Eric Angelini, "Array with primes." Pers. comm. on the SeqFan mailing list, Sep. 7 2005.

Links

• G. C. Greubel, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A000040, A000079, A239885.

Programs

Magma

[2^(n-1)*NthPrime(n): n in [1..50]]; // G. C. Greubel, Jan 04 2023

Mathematica

Table[2^(n-1)*Prime[n], {n, 30}]

SageMath

[2^(n-1)*nth_prime(n) for n in range(1,50)] # G. C. Greubel, Jan 04 2023

Formula

a(n) = 2*A239885(n). - G. C. Greubel, Jan 04 2023