A084331 a(1) = 2; a(n+1) is the least prime p not already used such that |p-a(n)| is not equal to |a(k+1)-a(k)| for any k < n.

2, 3, 5, 11, 7, 17, 29, 13, 31, 23, 37, 59, 19, 43, 71, 41, 61, 97, 47, 73, 107, 53, 101, 139, 67, 109, 167, 79, 131, 163, 83, 127, 173, 89, 149, 211, 103, 179, 113, 181, 251, 137, 193, 257, 151, 229, 311, 157, 269, 359, 191, 277, 373, 197, 271, 389, 199, 293

Offset

1,1

Links

Table of n, a(n) for n=1..58.

Example

13 (not 19) follows 29 as 29-13 = 16 has not occurred as the difference of successive terms, though 19 has also not occurred earlier but 29-19 = 10 = 17-7.

Crossrefs

Cf. A081145, A084334, A101595.

Sequence in context: A248793 A131200 A101595 * A084333 A288833 A067663

Adjacent sequences: A084328 A084329 A084330 * A084332 A084333 A084334

Keyword

nonn,easy

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jun 17 2003

Extensions

Edited and extended by David Wasserman, Dec 14 2004

Status

approved