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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 Harvey P. Dale, Table of n, a(n) for n = 1..100 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 Cf. A083566, A084723, A084725. Sequence in context: A083769 A057656 A247066 * A283233 A189400 A285342 Adjacent sequences: A084721 A084722 A084723 * A084725 A084726 A084727 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 August 13 07:12 EDT 2024. Contains 375113 sequences. (Running on oeis4.)