A231578 Sequence of pairs k,g such that k is the smallest and k*2^n+1-g, k*2^n+1, k*2^n+1+g are three consecutive primes in arithmetic progression.

105, 12, 1, 2, 219, 6, 37, 6, 245, 12, 109, 6, 39, 6, 1, 6, 245, 12, 669, 6, 9, 6, 45, 12, 5, 12, 1413, 6, 297, 6, 37, 6, 2019, 18, 603, 24, 467, 6, 897, 6, 303, 6, 1687, 12, 77, 30, 1437, 6, 711, 36, 2293, 6, 315, 42, 525, 12, 1799, 12, 4137, 30, 1019, 6

Offset: 1

Author

Pierre CAMI, Nov 11 2013

Keywords

• nonn

Examples

			1*2^8+1-6=251, 1*2^8+1=257, 1*2^8+1+6=263, so the pair for n=8 is 1,6.
		

Links

• Pierre CAMI, Table of n, a(n) for n = 1..1300
• Pierre CAMI, PFGW Script

Crossrefs

Cf. A231576.