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A336060
Numbers p such that p, 2p-1, 3p-2, 4p-3, 5p-4, 6p-5, 7p-6, 8p-7 are primes.
3
512821, 22240681, 26486461, 99597961, 593009341, 1021157551, 1041298441, 1281196561, 1349985001, 1426148011, 1660907431, 1894757971, 2544774541, 3590232241, 3958824871, 4012463281, 4219580191, 4363137241, 6482599411, 7178651971, 8051820421, 8417194381
OFFSET
1,1
COMMENTS
Each term is 1 modulo 210.
The subset p, 2p-1, 4p-3, 8p-7 is a Cunningham chain of the 2nd kind, cf. A057327.
LINKS
Jeppe Stig Nielsen, Table of n, a(n) for n = 1..50
Wikipedia, Cunningham chain
MATHEMATICA
Select[Prime[Range[387*10^6]], AllTrue[Table[n #-(n-1), {n, 2, 8}], PrimeQ]&] (* Harvey P. Dale, Mar 01 2023 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Jeppe Stig Nielsen, Jul 07 2020
STATUS
approved