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EXAMPLE
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n a(n) = m A346399(m) Symmetrical consecutive primes centered at m
-- ---------- ---------- --------------------------------------------
1 1 0 { }
2 2 1 {2}
3 4 2 {3,5}
4 5 3 {3,5,7}
5 9 4 {5,7,11,13}
6 12 6 {5,7,11,13,17,19}
7 30 10 {13,17,19,23,29,31,37,41,43,47}
8 165 12 {m +- 2,8,14,16,26,28}
9 8021811 14 {m +- 10,20,22,40,52,58,62}
10 1071065190 16 {m +- 11,23,37,49,53,61,67,79}
11 1613902650 18 {m +- 1,7,23,29,49,77,83,89,97}
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