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A058023
a(n) is the largest prime < A051451(n) - 1.
3
3, 7, 53, 409, 829, 2503, 27701, 360337, 720703, 12252197, 232792501, 5354228843, 26771144371, 80313433159, 2329089562747, 72201776446757, 144403552893563, 5342931457063157, 219060189739591153, 9419588158802421517, 442720643463713815129
OFFSET
3,1
COMMENTS
This is a companion to A058019.
LINKS
EXAMPLE
A051451(6) = 420, 420 - 1 = 419 is preceded by the prime 409, so a(6) = 409.
MATHEMATICA
NextPrime[Rest@ FoldList[LCM, Select[Range[50], PrimePowerQ]] - 1, -1] (* Amiram Eldar, Aug 27 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Nov 15 2000
EXTENSIONS
Edited by N. J. A. Sloane, Aug 20 2021
STATUS
approved