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Search: id:A099667
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A099667 a[n] is the largest prime before A002281[n] repdigits. +0
2
5, 73, 773, 7759, 77773, 777769, 7777769, 77777761, 777777773, 7777777741, 77777777767, 777777777773, 7777777777771, 77777777777753, 777777777777773, 7777777777777753, 77777777777777747, 777777777777777743 (list; graph; listen)
OFFSET

1,1

EXAMPLE

n=2: 73 is before 77.

MATHEMATICA

<<NumberTheory`NumberTheoryFunctions` Table[Table[PreviousPrime[7*(10^n-1)/9], {n, 1, 35}]

CROSSREFS

Cf. A003618, A003617, A096497, A096498, A068104, A002275-A002283, A099656-A099668.

Sequence in context: A070526 A070530 A059017 this_sequence A108444 A127167 A005259

Adjacent sequences: A099664 A099665 A099666 this_sequence A099668 A099669 A099670

KEYWORD

base,nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Nov 17 2004

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.


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