A087738 Square array: T(n,k) gives n-th number a such that a^(2^k)+1 is prime (a generalized Fermat).

1, 2, 1, 4, 2, 1, 6, 4, 2, 1, 10, 6, 4, 2, 1, 12, 10, 6, 4, 2, 1, 16, 14, 16, 118, 44, 30, 1, 18, 16, 20, 132, 74, 54, 102, 1, 22, 20, 24, 140, 76, 96, 162, 120, 1, 28, 24, 28, 152, 94, 112, 274, 190, 278, 1, 30, 26, 34, 208, 156, 114, 300, 234, 614, 46, 1, 36, 36, 46, 240, 158

Offset: 0

Author

Jeppe Stig Nielsen, Oct 01 2003

Keywords

• nonn
• tabl

Examples

			{1}; {2,1}; {4,2,1}; ...
See the well-formed array on Gallot's page.
		

References

• Harvey Dubner, J. Recr. Math., 18, 1986.

Links

• Yves Gallot, Generalized Fermat Prime Search.

Crossrefs

Cf. A056993, A006093, A005574, A000068, A006314, A006313, A006315, A006316, A056994, A056995, A057465, A057002, A088361, A088362.