A100479 a(n) = prime(2n-1) + prime(2n).

5, 12, 24, 36, 52, 68, 84, 100, 120, 138, 152, 172, 198, 210, 222, 258, 276, 300, 320, 340, 360, 384, 396, 434, 456, 472, 492, 520, 540, 558, 576, 618, 630, 668, 696, 712, 740, 762, 786, 810, 840, 864, 882, 906, 924, 946, 978, 1002, 1030, 1064, 1104, 1132

Offset: 1

Author

Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Nov 22 2004

Keywords

• nonn

Links

• G. C. Greubel, Table of n, a(n) for n = 1..10000
• C. Caldwell Lists of small primes.

Crossrefs

Cf. A092163, A001043, A031215, A031368.

Programs

Magma

[(&+[NthPrime(2*n+j-1): j in [0..1]]): n in [1..70]]; // G. C. Greubel, Apr 05 2023

Maple

A100479 := proc(n)
    ithprime(2*n-1)+ithprime(2*n) ;
end proc:
seq(A100479(n),n=1..50) ; # R. J. Mathar, Jan 20 2025

Mathematica

Total/@Partition[Prime[Range[110]],2] (* Harvey P. Dale, Apr 20 2016 *)

SageMath

[sum(nth_prime(2*n+j-1) for j in range(2)) for n in range(1, 71)] # G. C. Greubel, Apr 05 2023

Formula

a(n) = A001043(2n-1). - R. J. Mathar, Apr 20 2009

a(n) = A031368(n) + A031215(n). - G. C. Greubel, Apr 05 2023