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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

Table of n, a(n) for n=1..28.

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.)