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A266951
Record values in A266948: least prime p such that p-2 and 6n-p are also prime.
2
0, 5, 7, 13, 31, 109, 139, 199, 241, 283, 601, 619, 643, 823, 859, 883, 1021, 1051, 1093, 1291, 1621, 1873, 1879, 1951, 2311, 3001, 3301, 3361, 3529, 3583, 3919, 3931, 4339, 5419, 5479, 5851, 6361
OFFSET
1,2
COMMENTS
Goldbach conjecture related. The values of A266948(n) range theoretically between 2 and n. The smaller they are, the easier it was to find a suitable twin prime, and thus the more likely the conjecture "A266948(n) > 0 for all n > 1" holds. These record values vs. the respective indices A266950 yield an estimate for the growth of an upper bound.
CROSSREFS
Sequence in context: A101782 A288889 A168609 * A102903 A294064 A018464
KEYWORD
nonn,more
AUTHOR
M. F. Hasler, Jan 06 2016
EXTENSIONS
a(28)-a(37) from Pontus von Brömssen, Jan 06 2024
STATUS
approved