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A072673 Primes of form prime(n)*prime(2*n)+prime(n)+prime(2*n). 3
11, 31, 83, 359, 1487, 4283, 4751, 5471, 7127, 12527, 41183, 66863, 71339, 85247, 186119, 274223, 290987, 338687, 373859, 386219, 400679, 465299, 490643, 663407, 720791, 827147, 883739, 1096127, 1124603 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
A000040(236) = 1487 = 1403+23+61 = 23*61+23+61 = A000040(9)*A000040(18)+A000040(9)+A000040(18), therefore 1487 is a term.
MATHEMATICA
p[n_]:=Module[{p1=Prime[n], p2=Prime[2n]}, p1*p2+p1+p2]; Select[ Array[ p, 200], PrimeQ] (* Harvey P. Dale, Jul 14 2014 *)
CROSSREFS
Sequence in context: A038768 A269789 A072672 * A250461 A259508 A126365
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jun 30 2002
STATUS
approved

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Last modified March 29 09:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)