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Search: id:A060845
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A060845 Largest prime < a nontrivial power of a prime. +0
2
3, 7, 7, 13, 23, 23, 31, 47, 61, 79, 113, 113, 127, 167, 241, 251, 283, 337, 359, 509, 523, 619, 727, 839, 953, 1021, 1327, 1367, 1669, 1847, 2039, 2179, 2179, 2207, 2399, 2803, 3121, 3469, 3719, 4093, 4483, 4909, 5039, 5323, 6229, 6553, 6857, 6883, 7919 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n) = prevprime[A025475(n)] = A007917[A025475(n)] = Max{p| p<A025475(n)}

EXAMPLE

78125=5^7 follows 78121

CROSSREFS

Cf. A025475, A000961, A001597, A001694, A007917, A007918, A013632, A013633, A049711, A060846.

Adjacent sequences: A060842 A060843 A060844 this_sequence A060846 A060847 A060848

Sequence in context: A073881 A137315 A118259 this_sequence A060215 A059478 A081218

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), May 03 2001

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Last modified May 14 01:44 EDT 2008. Contains 139663 sequences.


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