A092163 a(n) = prime(2n) + prime(2n+1).

8, 18, 30, 42, 60, 78, 90, 112, 128, 144, 162, 186, 204, 216, 240, 268, 288, 308, 330, 352, 372, 390, 410, 450, 462, 480, 508, 532, 548, 564, 600, 624, 648, 684, 702, 726, 752, 772, 798, 828, 852, 872, 892, 918, 930, 966, 990, 1012, 1044, 1088, 1120, 1140

Offset

1,1

Links

Table of n, a(n) for n=1..52.

Formula

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

a(n) = 2*A058296(n+1). - Hugo Pfoertner, Aug 11 2025

Example

a(1) = 8 because p(2)= 3 and p(3) = 5.
a(2) = 18 because p(4)= 7 and p(5) = 11.
a(3) = 30 because p(6)= 13 and p(7) = 17.

Maple

A092163 := proc(n)
    ithprime(2*n)+ithprime(2*n+1) ;
end proc:
seq(A092163(n), n=1..50) ; # R. J. Mathar, Jan 20 2025

Mathematica

Table[ Prime[2n] + Prime[2n + 1], {n, 50}] (* Robert G. Wilson v, Apr 22 2004 *)

Crossrefs

Cf. A000040, A001043, A058296, A100479.

Sequence in context: A084394 A085248 A278546 * A100592 A028563 A171523

Adjacent sequences: A092160 A092161 A092162 * A092164 A092165 A092166

Keyword

nonn

Author

Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Mar 31 2004

Extensions

More terms from Robert G. Wilson v, Apr 22 2004

Status

approved