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A092390
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a(n) = prime(n) + prime(2n).
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0
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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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.
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MATHEMATICA
| Table[Prime[n]+Prime[2n], {n, 60}] (* From Harvey P. Dale, Jan 03 2012 *)
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CROSSREFS
| Cf. A000040.
Equals 2*A087461(n+1) for n>0.
Sequence in context: A020642 A067253 A048822 * A035608 A091386 A164004
Adjacent sequences: A092387 A092388 A092389 * A092391 A092392 A092393
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KEYWORD
| nonn,easy
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AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Apr 03 2004
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EXTENSIONS
| More terms from Pab Ter (pabrlos(AT)yahoo.com), May 25 2004
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