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 A145606 Largest number x such that x and x+1 are prime(n)-smooth but not prime(n-1)-smooth. 9
 1, 8, 80, 4374, 9800, 123200, 336140, 11859210, 5142500, 177182720, 1611308699, 3463199999, 63927525375, 421138799639, 1109496723125, 1453579866024, 20628591204480, 31887350832896, 12820120234375, 119089041053696, 2286831727304144, 9591468737351909375, 17451620110781856, 166055401586083680, 49956990469100000, 4108258965739505499, 19316158377073923834000, 386539843111191224 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Note that this sequence is not always increasing. For many n, a(n) is the same as A002072(n). See A145605 for a triangle of values. LINKS Jim White, Results to P = 127 CROSSREFS Cf. A002072, A117581, A175607. Sequence in context: A222671 A271443 A240325 * A002072 A193943 A067449 Adjacent sequences:  A145603 A145604 A145605 * A145607 A145608 A145609 KEYWORD nonn AUTHOR T. D. Noe, Oct 14 2008 EXTENSIONS Terms a(16) onward by Andrey V. Kulsha, Aug 10 2011, according to Jim White's computations STATUS approved

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Last modified February 29 03:04 EST 2020. Contains 332353 sequences. (Running on oeis4.)