A175580 Numbers n with property that numbers (2k+1)n-2k k=0..7 are all prime.

25153801, 507079861, 610817971, 942962791, 1040241511, 1223511871, 1797884761, 2200595671, 2291395471, 2304999061, 2429694541, 3078011161, 3509229571, 3733373491, 3896865631, 4017254011, 4747505071, 4847389471

Offset

1,1

Comments

a(17)=4747505071=A175568(1).

All terms are of form 210m+1 with m = 119780, 2414666, 2908657, 4490299, 4953531, 5826247, 8561356, 10479027, 10911407, 10976186, 11569974, 14657196, 16710617, 17777969, 18556503, 19129781, 22607167, 23082807, 23543359, 25241957, 26655168, 32729717, 33285539, 41423243, 41720261, 43190411, 45671932

Links

Table of n, a(n) for n=1..18.

Crossrefs

Cf. A175568 Numbers n with property that (2k+1)n-2k k=0..8 are all prime,

Cf. A175566 a(n) = the least prime p such that (2*k + 1)*p - 2*k, k=1..n are all prime.

Sequence in context: A186839 A206084 A187439 * A204778 A172795 A056915

Adjacent sequences: A175577 A175578 A175579 * A175581 A175582 A175583

Keyword

nonn

Author

Zak Seidov, Jul 15 2010

Status

approved