The On-Line Encyclopedia of Integer Sequences (OEIS)

A092390 revision #6

A092390

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

5, 10, 18, 26, 40, 50, 60, 72, 84, 100, 110, 126, 142, 150, 160, 184, 198, 212, 230, 244, 254, 272, 282, 312, 326, 340, 354, 370, 380, 394, 420, 442, 454, 476, 498, 510, 530, 546, 564, 582, 600, 614, 634, 650, 660, 678, 702, 726, 748, 770, 790, 808, 818, 844

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

EXAMPLE

a(1) = 5 because p(1)= 2 and p(2) = 3.

a(2) = 10 because p(2)= 3 and p(4) = 7.

a(3) = 18 because p(3)= 5 and p(6) = 13.

MATHEMATICA

Table[Prime[n]+Prime[2n], {n, 60}] (* Harvey P. Dale, Jan 03 2012 *)

CROSSREFS