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A084724 Beginning with 2, the smallest even number greater than the previous term such that every partial product + 1 is a prime. 5
2, 6, 8, 12, 16, 18, 20, 22, 26, 36, 42, 44, 100, 120, 124, 162, 168, 174, 192, 218, 272, 278, 338, 364, 380, 392, 502, 512, 532, 560, 594, 614, 698, 790, 814, 838, 922, 938, 1072, 1082, 1092, 1102, 1146, 1182, 1256, 1354, 1360, 1484, 1508, 1566, 1662, 1690 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
ppp[{p_, a_}]:=Module[{n=a+2}, While[!PrimeQ[p*n+1], n=n+2]; {p*n, n}]; NestList[ ppp, {2, 2}, 60][[All, 2]] (* Harvey P. Dale, Aug 12 2017 *)
CROSSREFS
Sequence in context: A083769 A057656 A247066 * A283233 A189400 A285342
KEYWORD
nonn
AUTHOR
Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jun 13 2003
EXTENSIONS
More terms from David Wasserman, Jan 03 2005
STATUS
approved

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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)